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description: Julia Fischer (born 15 June 1983) is a German classical violinist, violist, and pianist.Violinist Julia Fischer Voted Artist of the Year, article by Tom Huizenga, site of the NPR, 4 October 2007.Biogr
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Piano Trio No. 2 in E-Flat Major, Op. 100, D. 929: III. Scherzando. Allegro moderato
type: MusicRecording
duration: PT6M19S
duration ms: 379000
explicit: false
by artist: Franz Schubert
by artist: Storioni Trio
in album: Schubert: Famous Pieces
  type: MusicAlbum
  date published: 2020-12-04
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420603107
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420603107
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61356b6c90ed694de3409257aea2b36ddf7f2dcab0bd2ad0da169533b44e687. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420603107 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Piano Trio No. 2 in E-Flat Major, Op. 100, D. 929: III. Scherzando. Allegro moderato
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Winterreise, Op. 89, D. 911 (Excerpts): No. 20, Der Wegweiser
type: MusicRecording
duration: PT4M37S
duration ms: 277213
explicit: false
by artist: Franz Schubert
by artist: Ian Bostridge
by artist: Thomas Adès
in album: Schubert: Famous Pieces
  type: MusicAlbum
  date published: 2020-12-04
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE421903720
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421903720
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T20:42:35Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83156be6e680a38151a54052a87dc76b3e3ceb4e9c163ac26a4eee33170fd946. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421903720 — a six-check JSON result.
  date published: 2026-07-31T20:42:35Z
audio: Winterreise, Op. 89, D. 911 (Excerpts): No. 20, Der Wegweiser
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Symphony No. 2 in B-Flat Major, D. 125: II. Andante
type: MusicRecording
duration: PT7M7S
duration ms: 427533
explicit: false
by artist: Franz Schubert
by artist: B'Rock Orchestra
by artist: René Jacobs
in album: Schubert: Famous Pieces
  type: MusicAlbum
  date published: 2020-12-04
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE422004702
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T12:50:05+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422004702
additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0259cd013ec7caf35c7746ee6ffc89f2771e600c3f099bb99b2d16c96c6ce7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE422004702 — a six-check JSON result.
  date published: 2026-07-31T13:04:34Z
audio: Symphony No. 2 in B-Flat Major, D. 125: II. Andante
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Du bist die Ruh, Op. 59 No. 3, D. 776 (Arr. X. van Dijk for String Quartet)
type: MusicRecording
duration: PT3M43S
duration ms: 223200
explicit: false
by artist: Franz Schubert
by artist: Signum Quartet
in album: Schubert: Famous Pieces
  type: MusicAlbum
  date published: 2020-12-04
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE421701514
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421701514
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97d60e4edbdec34095874ec50b1700d8e8d7d2da77c3212936db5a48830b7d1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421701514 — a six-check JSON result.
  date published: 2026-07-08T03:53:27Z
audio: Du bist die Ruh, Op. 59 No. 3, D. 776 (Arr. X. van Dijk for String Quartet)
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  additional property: Musical Key
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    type: PropertyValue
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  additional property: Danceability
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  additional property: Loudness (dB)
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Piano Sonata in B-Flat Major, D. 960: III. Scherzo. Allegro vivace con delicatezza
type: MusicRecording
duration: PT3M53S
duration ms: 233747
explicit: false
by artist: Franz Schubert
by artist: Francesco Piemontesi
in album: Schubert: Famous Pieces
  type: MusicAlbum
  date published: 2020-12-04
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE421902611
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960468
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421902611
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T21:25:57Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7755716150bb716b362cb3d588f0aec031b804f7c1ed9d494c563e3960c2784c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421902611 — a six-check JSON result.
  date published: 2026-07-31T21:25:57Z
audio: Piano Sonata in B-Flat Major, D. 960: III. Scherzo. Allegro vivace con delicatezza
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  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Violin Sonata in D Major, Op. 137 No. 1, D. 384: II. Andante
type: MusicRecording
duration: PT4M25S
duration ms: 265932
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert: Famous Pieces
  type: MusicAlbum
  date published: 2020-12-04
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900102
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900102
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846cb11fe5bfb733de57ab07473458ac6cc6f4529bca73bfbea7c9415a4b360d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900102 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Violin Sonata in D Major, Op. 137 No. 1, D. 384: II. Andante
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  additional property: Tempo (BPM)
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Piano Sonata in C Minor, D. 958: III. Menuetto. Allegro
type: MusicRecording
duration: PT3M14S
duration ms: 194092
explicit: false
by artist: Franz Schubert
by artist: Francesco Piemontesi
in album: Schubert: Famous Pieces
  type: MusicAlbum
  date published: 2020-12-04
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE421902603
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T20:28:09+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960468
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421902603
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T21:25:57Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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Erlkönig, Op. 1, D. 328 (Arr. M. Reger for Voice & Orchestra)
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Bruch & Dvorak Violin Concertos
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track: Violin Concerto No. 1 in G minor, Op. 26: 1. Vorspiel (Allegro moderato)
track: Violin Concerto No. 1 in G minor, Op. 26: 2. Adagio
track: Violin Concerto No. 1 in G minor, Op. 26: 3. Finale (Allegro energico)

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Violin Concerto in A minor, Op. 53: 3. Finale (Allegro giocoso, ma non troppo)
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Violin Concerto No. 1 in G minor, Op. 26: 1. Vorspiel (Allegro moderato)
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track: Sonata for Violin & Cello, M. 73: I. Allegro
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03761cb135ca05c1479abd86f97add64ba2e58485a7e1144e8e5efaf59e22f0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB951590208 — a six-check JSON result.
  date published: 2026-07-31T15:20:15Z
audio: Sonata for Violin & Cello, M. 73: I. Allegro
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Sonata for Violin & Cello, M. 73: II. Tres vif
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duration: PT3M12S
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by artist: Maurice Ravel
by artist: Julia Fischer
by artist: Daniel Müller-Schott
in album: Duo Sessions
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  date published: 2016-09-09
genre: classical
genre: impressionism
genre: neoclassicism
genre: post-romantic-era
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f035c19ced4f3045954144afe57ed18f6047f6af76edc59ca79efd743d7a64. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB951590209 — a six-check JSON result.
  date published: 2026-07-31T17:29:52Z
audio: Sonata for Violin & Cello, M. 73: II. Tres vif
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Passacaglia in G Minor (after G.F. Handel's Keyboard Suite No. 7 in G Minor, HWV 432: VI. Passacaille) (arr. for violin and cello)
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duration ms: 359760
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by artist: Johan Halvorsen
by artist: Julia Fischer
by artist: Daniel Müller-Schott
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f73d08c780d99f2a9f7dc7d618c1da01d5c07932eaf2c024ee11a33fcfb82d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB951590212 — a six-check JSON result.
  date published: 2026-06-13T12:53:06Z
audio: Passacaglia in G Minor (after G.F. Handel's Keyboard Suite No. 7 in G Minor, HWV 432: VI. Passacaille) (arr. for violin and cello)
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Mendelssohn-Bartholdy: Piano Trios 1 & 2
type: MusicAlbum
date published: 2006-06-01
track: Piano Trio No. 1 in D Minor, Op. 49, MWV Q 29: I. Molto allegro agitato
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  by artist: Felix Mendelssohn
  by artist: Julia Fischer
  by artist: Jonathan Gilad
  by artist: Daniel Müller-Schott
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    type: MusicAlbum
    date published: 2006-06-01
  genre: classical
  genre: early-romantic-era
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  genre: classical-piano
  genre: choral
  genre: chamber-music
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  additional property: OTSVerificationAPI
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    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600201
  additional property: OTSTimestamp
    type: PropertyValue
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758fe6f6f259d1cb1ccbb1b334b339250b8d57a648e30a2b873f40bd8d1c5db9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600201 — a six-check JSON result.
    date published: 2026-07-02T03:30:09Z
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track: Piano Trio No. 1 in D Minor, Op. 49, MWV Q 29: II. Andante con moto tranquillo
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    date published: 2006-06-01
  genre: classical
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f006238342462d81491b3405a9bfdb358a5a32dbc70b316786ae0392070468. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600202 — a six-check JSON result.
    date published: 2026-07-02T03:55:08Z
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track: Piano Trio No. 1 in D Minor, Op. 49, MWV Q 29: III. Scherzo
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  by artist: Felix Mendelssohn
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    date published: 2006-06-01
  genre: classical
  genre: early-romantic-era
  genre: german-romanticism
  genre: classical-piano
  genre: choral
  genre: chamber-music
  isrc code: NLE420600203
  additional property: CopyrightID
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  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSVerificationAPI
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  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Piano Trio No. 1 in D Minor, Op. 49, MWV Q 29: III. Scherzo
track: Piano Trio No. 1 in D Minor, Op. 49, MWV Q 29: IV. Finale
track: Piano Trio No. 2 in C Minor, Op. 66, MWV Q33: I. Allegro energico e con fuoco
track: Piano Trio No. 2 in C Minor, Op. 66, MWV Q 33: II. Andante espressivo
track: Piano Trio No. 2 in C Minor, Op. 66, MWV Q33: III. Scherzo - Molto allegro
track: Piano Trio No. 2 in C Minor, Op. 66, MWV Q33: IV. Finale-Allegro appassionato

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OTSBitcoinBlock
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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600203

OTSTimestamp
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OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514a07417ec9a34b6ccb569d00f5e569a56a3b11b816883d679befafb95311be. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600203 — a six-check JSON result.
date published: 2026-07-02T03:55:08Z

Piano Trio No. 1 in D Minor, Op. 49, MWV Q 29: III. Scherzo
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Piano Trio No. 1 in D Minor, Op. 49, MWV Q 29: IV. Finale
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by artist: Julia Fischer
by artist: Jonathan Gilad
by artist: Daniel Müller-Schott
in album: Mendelssohn-Bartholdy: Piano Trios 1 & 2
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  date published: 2006-06-01
genre: classical
genre: early-romantic-era
genre: german-romanticism
genre: classical-piano
genre: choral
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T14:03:35Z
audio: Piano Trio No. 1 in D Minor, Op. 49, MWV Q 29: IV. Finale
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Piano Trio No. 2 in C Minor, Op. 66, MWV Q33: I. Allegro energico e con fuoco
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by artist: Julia Fischer
by artist: Jonathan Gilad
by artist: Daniel Müller-Schott
in album: Mendelssohn-Bartholdy: Piano Trios 1 & 2
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  date published: 2006-06-01
genre: classical
genre: early-romantic-era
genre: german-romanticism
genre: classical-piano
genre: choral
genre: chamber-music
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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Piano Trio No. 2 in C Minor, Op. 66, MWV Q 33: II. Andante espressivo
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by artist: Julia Fischer
by artist: Jonathan Gilad
by artist: Daniel Müller-Schott
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  date published: 2006-06-01
genre: classical
genre: early-romantic-era
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genre: classical-piano
genre: choral
genre: chamber-music
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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Piano Trio No. 2 in C Minor, Op. 66, MWV Q33: III. Scherzo - Molto allegro
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by artist: Julia Fischer
by artist: Jonathan Gilad
by artist: Daniel Müller-Schott
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  date published: 2006-06-01
genre: classical
genre: early-romantic-era
genre: german-romanticism
genre: classical-piano
genre: choral
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T14:50:41Z
audio: Piano Trio No. 2 in C Minor, Op. 66, MWV Q33: III. Scherzo - Molto allegro
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Piano Trio No. 2 in C Minor, Op. 66, MWV Q33: IV. Finale-Allegro appassionato
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by artist: Julia Fischer
by artist: Jonathan Gilad
by artist: Daniel Müller-Schott
in album: Mendelssohn-Bartholdy: Piano Trios 1 & 2
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genre: classical
genre: early-romantic-era
genre: german-romanticism
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genre: choral
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T15:38:35Z
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Poème
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date published: 2011-01-01
track: Poema autunnale for violin & orchestra
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:30:09Z
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track: Fantasy Opus 24
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-29T19:35:34Z
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track: Poème, Op. 25
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  audio: Poème, Op. 25
track: The Lark Ascending

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OTSVerifyInstructions
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value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
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date published: 2026-07-02T05:09:12Z

Poème, Op. 25
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The Lark Ascending
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
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Limoncello: Celebrating Chamber Music
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Spritz: Celebrating Concerto Music
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Schubert Complete Works for Violin and Piano, Vol. 2
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Schubert Complete Works for Violin and Piano, Vol. 1
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-29T13:09:35Z
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T15:41:10Z
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  subject of: OpenTimestamps Proof of Existence
  audio: Violin Sonata (Sonatina) in D Major, Op. 137 No. 1, D. 384: III. Allegro vivace
track: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: I. Allegro moderato
track: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: II. Andante
track: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: III. Menuetto and Trio
track: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: I. Allegro giusto
track: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: III. Menuetto and Trio
track: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: IV. Allegro moderato
track: Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro

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OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:20:19Z

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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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  type: PropertyValue
  value: https://blockstream.info/api/block-height/960247
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900105
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T10:42:33Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec262c498f2fd588c0ce041d8bf0d227ec92ca0dca9e7130f85673277002f930. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900105 — a six-check JSON result.
  date published: 2026-07-30T10:42:33Z
audio: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: II. Andante
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Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: III. Menuetto and Trio
type: MusicRecording
duration: PT2M13S
duration ms: 133226
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano, Vol. 1
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900106
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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  value: 2026-07-07T05:29:38+00:00
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xdec86cf93d221d98dc44824d6a6f7637e7155d830e1d8abe12afe8a73f99a712
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900106
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec86cf93d221d98dc44824d6a6f7637e7155d830e1d8abe12afe8a73f99a712. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900106 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: III. Menuetto and Trio
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Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: I. Allegro giusto
type: MusicRecording
duration: PT4M46S
duration ms: 286332
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano, Vol. 1
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900108
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900108
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T05:17:02Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ede52bd4e1a7fa2258ab680920859e2608a95c33feacb23722aa32ef6b4ab1. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900108 — a six-check JSON result.
  date published: 2026-07-31T05:17:02Z
audio: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: I. Allegro giusto
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Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: III. Menuetto and Trio
type: MusicRecording
duration: PT2M28S
duration ms: 148640
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano, Vol. 1
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900110
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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  value: 2026-06-11T12:25:41+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900110
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T15:41:10Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426190a0840f623f3717b55bda8fb7051a5a8756383735d9ee19074e5cc7b374. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900110 — a six-check JSON result.
  date published: 2026-06-13T15:41:10Z
audio: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: III. Menuetto and Trio
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Key Name
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Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: IV. Allegro moderato
type: MusicRecording
duration: PT4M8S
duration ms: 248880
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano, Vol. 1
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900111
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900111
additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3051cacac31cafc7a720489bd79776267744622b8a282e0872b3b3e10e39d738. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900111 — a six-check JSON result.
  date published: 2026-07-30T17:23:26Z
audio: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: IV. Allegro moderato
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  additional property: Musical Key
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro
type: MusicRecording
duration: PT14M30S
duration ms: 870883
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano, Vol. 1
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900112
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T07:09:45+00:00
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x127d3f838a386b48e6392e983d3a4d166251f04f97fba25cf3a7113d26e04e2b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900112
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127d3f838a386b48e6392e983d3a4d166251f04f97fba25cf3a7113d26e04e2b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900112 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro
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  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Valence (Positivity)
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Schubert Complete Works for Violin and Piano
type: MusicAlbum
date published: 2009-08-01
track: Violin Sonata (Sonatina) in D Major, Op. 137 No. 1, D. 384: I. Allegro molto
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    type: MusicAlbum
    date published: 2009-08-01
  genre: classical
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  genre: chamber-music
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  additional property: CopyrightID
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900101
  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ace1382c383c86969b02b4db4289bf6f2e891ebe21b4fd443c89e6f7462d8f2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900101 — a six-check JSON result.
    date published: 2026-07-29T19:35:34Z
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    additional property: Mode (Major/Minor)
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    date published: 2026-07-30T02:30:29Z
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track: Violin Sonata in A Major "Duo", Op. 162, D. 574: II. Scherzo
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track: Fantasy in C Major, Op. 159, D. 934: I. Andante molto
track: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: III. Menuetto and Trio
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track: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: I. Allegro giusto
track: Fantasy in C Major, Op. 159, D. 934: IV. Allegro - Allegretto - Presto
track: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: II. Andante
track: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: I. Allegro molto
track: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: III. Menuetto and Trio
track: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: II. Largo
track: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: IV. Allegro moderato
track: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: I.II. Allegro vivace
track: Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro
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date published: 2026-07-08T03:20:19Z

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Violin Sonata in A Major "Duo", Op. 162, D. 574: II. Scherzo
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T09:57:33Z
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Violin Sonata (Sonatina) in D Major, Op. 137 No. 1, D. 384: III. Allegro vivace
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Violin Sonata in A Major "Duo", Op. 162, D. 574: III. Andantino
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subject of: OpenTimestamps Proof of Existence
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  additional property: Acousticness
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.025
  additional property: Liveness
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    value: 0.061
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.064
  additional property: Loudness (dB)
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Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: II. Andante
type: MusicRecording
duration: PT7M29S
duration ms: 449013
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900105
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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  value: 2026-07-30T10:11:03+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xec262c498f2fd588c0ce041d8bf0d227ec92ca0dca9e7130f85673277002f930
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960247
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900105
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T10:42:33Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec262c498f2fd588c0ce041d8bf0d227ec92ca0dca9e7130f85673277002f930. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900105 — a six-check JSON result.
  date published: 2026-07-30T10:42:33Z
audio: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: II. Andante
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  additional property: Tempo (BPM)
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Fantasy in C Major, Op. 159, D. 934: I. Andante molto
type: MusicRecording
duration: PT3M22S
duration ms: 202720
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900205
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-05T13:10:29+00:00
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x47eae4b73e3fc3fa9ea7ce4eb371861b30b8d91130e18c41378b93232b890bfd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953513
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953513
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900205
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eae4b73e3fc3fa9ea7ce4eb371861b30b8d91130e18c41378b93232b890bfd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900205 — a six-check JSON result.
  date published: 2026-06-13T12:47:07Z
audio: Fantasy in C Major, Op. 159, D. 934: I. Andante molto
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  additional property: Tempo (BPM)
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  additional property: Mode (Major/Minor)
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Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: III. Menuetto and Trio
type: MusicRecording
duration: PT2M13S
duration ms: 133226
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900106
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T05:29:38+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdec86cf93d221d98dc44824d6a6f7637e7155d830e1d8abe12afe8a73f99a712
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957120
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900106
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec86cf93d221d98dc44824d6a6f7637e7155d830e1d8abe12afe8a73f99a712. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900106 — a six-check JSON result.
  date published: 2026-07-08T03:22:41Z
audio: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: III. Menuetto and Trio
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Mode Name
    type: PropertyValue
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Fantasy in C Major, Op. 159, D. 934: II. Allegretto
type: MusicRecording
duration: PT5M36S
duration ms: 336333
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900206
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-29T16:22:58+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x36e9ed9e0e40c46719c8e147ff09b28d2f6a93868e4a5cde5d6fe51a1a0bd67f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960138
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900206
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T19:35:34Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e9ed9e0e40c46719c8e147ff09b28d2f6a93868e4a5cde5d6fe51a1a0bd67f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900206 — a six-check JSON result.
  date published: 2026-07-29T19:35:34Z
audio: Fantasy in C Major, Op. 159, D. 934: II. Allegretto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 129.754
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.958
  additional property: Instrumentalness
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    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.468
  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: IV. Allegro moderato
type: MusicRecording
duration: PT4M39S
duration ms: 279667
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900107
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T03:59:27+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc07e0d7b7932686c49e17334d0a612df765b65cbda9d2b6fc20f4e9feccbe8ad
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900107
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07e0d7b7932686c49e17334d0a612df765b65cbda9d2b6fc20f4e9feccbe8ad. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900107 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Violin Sonata (Sonatina) in A Minor, Op. 137 No. 2, D. 385: IV. Allegro moderato
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  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.305
  additional property: Energy
    type: PropertyValue
    value: 0.065
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.213
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.615
  additional property: Key Name
    type: PropertyValue
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  additional property: Mode Name
    type: PropertyValue
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Fantasy in C Major, Op. 159, D. 934: III. Andantino
type: MusicRecording
duration: PT10M21S
duration ms: 621932
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900207
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-19T13:27:00+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xaa4485386bd0edf8457a0f54743a1bd8ac6126ff236d25709bf4a086b7727cf9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900207
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4485386bd0edf8457a0f54743a1bd8ac6126ff236d25709bf4a086b7727cf9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900207 — a six-check JSON result.
  date published: 2026-07-02T03:30:09Z
audio: Fantasy in C Major, Op. 159, D. 934: III. Andantino
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 135.346
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.457
  additional property: Energy
    type: PropertyValue
    value: 0.101
  additional property: Speechiness
    type: PropertyValue
    value: 0.051
  additional property: Acousticness
    type: PropertyValue
    value: 0.962
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.043
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: I. Allegro giusto
type: MusicRecording
duration: PT4M46S
duration ms: 286332
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900108
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x68ede52bd4e1a7fa2258ab680920859e2608a95c33feacb23722aa32ef6b4ab1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960397
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960397
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900108
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T12:24:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ede52bd4e1a7fa2258ab680920859e2608a95c33feacb23722aa32ef6b4ab1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900108 — a six-check JSON result.
  date published: 2026-07-31T12:24:41Z
audio: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: I. Allegro giusto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 140.501
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.433
  additional property: Energy
    type: PropertyValue
    value: 0.038
  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  additional property: Acousticness
    type: PropertyValue
    value: 0.986
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.526
  additional property: Liveness
    type: PropertyValue
    value: 0.065
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.306
  additional property: Loudness (dB)
    type: PropertyValue
    value: -28.77
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fantasy in C Major, Op. 159, D. 934: IV. Allegro - Allegretto - Presto
type: MusicRecording
duration: PT5M59S
duration ms: 359172
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900208
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-29T23:56:20+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x02a6ac81712f2f9d1e237e77b21c0fa7634ef03ec271fab53bd9304a369a807e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960173
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960173
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900208
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T00:11:40Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a6ac81712f2f9d1e237e77b21c0fa7634ef03ec271fab53bd9304a369a807e. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900208 — a six-check JSON result.
  date published: 2026-07-30T00:11:40Z
audio: Fantasy in C Major, Op. 159, D. 934: IV. Allegro - Allegretto - Presto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 122.981
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.368
  additional property: Energy
    type: PropertyValue
    value: 0.087
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.95
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.369
  additional property: Liveness
    type: PropertyValue
    value: 0.097
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.155
  additional property: Loudness (dB)
    type: PropertyValue
    value: -22.191
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: II. Andante
type: MusicRecording
duration: PT4M43S
duration ms: 283640
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900109
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T00:25:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd309ee6eb59cbc171c781172a7423c1cba39f42b1ab7a566d0124e9187d8a244
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900109
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd309ee6eb59cbc171c781172a7423c1cba39f42b1ab7a566d0124e9187d8a244. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900109 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: II. Andante
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 111.505
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.223
  additional property: Energy
    type: PropertyValue
    value: 0.008
  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  additional property: Acousticness
    type: PropertyValue
    value: 0.985
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.075
  additional property: Liveness
    type: PropertyValue
    value: 0.064
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.145
  additional property: Loudness (dB)
    type: PropertyValue
    value: -33.184
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fantasia in F Minor for Piano Duet, Op. 103, D. 940: I. Allegro molto
type: MusicRecording
duration: PT4M55S
duration ms: 295267
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900209
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T09:53:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x009dfa3b57cda5df3ee9ce0b1a3b18c15b69c3bbd8bef8e3e38658adad45479f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960241
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960241
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900209
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T09:58:01Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009dfa3b57cda5df3ee9ce0b1a3b18c15b69c3bbd8bef8e3e38658adad45479f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900209 — a six-check JSON result.
  date published: 2026-07-30T09:58:01Z
audio: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: I. Allegro molto
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 121.486
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.345
  additional property: Energy
    type: PropertyValue
    value: 0.007
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.991
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.884
  additional property: Liveness
    type: PropertyValue
    value: 0.092
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.139
  additional property: Loudness (dB)
    type: PropertyValue
    value: -29.268
  additional property: Key Name
    type: PropertyValue
    value: F
  additional property: Mode Name
    type: PropertyValue
    value: Major

Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: III. Menuetto and Trio
type: MusicRecording
duration: PT2M28S
duration ms: 148640
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900110
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-11T12:25:41+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x426190a0840f623f3717b55bda8fb7051a5a8756383735d9ee19074e5cc7b374
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957124
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957124
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900110
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:53:27Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426190a0840f623f3717b55bda8fb7051a5a8756383735d9ee19074e5cc7b374. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900110 — a six-check JSON result.
  date published: 2026-07-08T03:53:27Z
audio: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: III. Menuetto and Trio
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 175.661
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.447
  additional property: Energy
    type: PropertyValue
    value: 0.063
  additional property: Speechiness
    type: PropertyValue
    value: 0.074
  additional property: Acousticness
    type: PropertyValue
    value: 0.941
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.547
  additional property: Liveness
    type: PropertyValue
    value: 0.111
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.677
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.517
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Fantasia in F Minor for Piano Duet, Op. 103, D. 940: II. Largo
type: MusicRecording
duration: PT2M47S
duration ms: 167960
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900210
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-23T09:25:56+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x5da7b41a1a9afd515e791342be386a166653abaed29655d70435b0fd7a55dd2f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900210
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da7b41a1a9afd515e791342be386a166653abaed29655d70435b0fd7a55dd2f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900210 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: II. Largo
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 139.5
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.43
  additional property: Energy
    type: PropertyValue
    value: 0.058
  additional property: Speechiness
    type: PropertyValue
    value: 0.056
  additional property: Acousticness
    type: PropertyValue
    value: 0.987
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.955
  additional property: Liveness
    type: PropertyValue
    value: 0.131
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.179
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.738
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: IV. Allegro moderato
type: MusicRecording
duration: PT4M8S
duration ms: 248880
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900111
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x3051cacac31cafc7a720489bd79776267744622b8a282e0872b3b3e10e39d738
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960397
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960397
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900111
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T12:24:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3051cacac31cafc7a720489bd79776267744622b8a282e0872b3b3e10e39d738. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900111 — a six-check JSON result.
  date published: 2026-07-31T12:24:41Z
audio: Violin Sonata (Sonatina) in G Minor, Op. 137 No. 3, D. 408: IV. Allegro moderato
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 129.372
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.465
  additional property: Energy
    type: PropertyValue
    value: 0.04
  additional property: Speechiness
    type: PropertyValue
    value: 0.048
  additional property: Acousticness
    type: PropertyValue
    value: 0.98
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.171
  additional property: Liveness
    type: PropertyValue
    value: 0.055
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.366
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.598
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
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Fantasia in F Minor for Piano Duet, Op. 103, D. 940: I.II. Allegro vivace
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duration: PT5M41S
duration ms: 341200
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900211
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900211
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1f539f7bf77c1a8362c5b7e3e1f5bb6c6907ad2f45a9daa049d7a2cb8cd5c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900211 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: I.II. Allegro vivace
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Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro
type: MusicRecording
duration: PT14M30S
duration ms: 870883
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900112
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900112
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:22:41Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127d3f838a386b48e6392e983d3a4d166251f04f97fba25cf3a7113d26e04e2b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900112 — a six-check JSON result.
  date published: 2026-07-08T03:22:41Z
audio: Rondo in B Minor, Op. 70, D. 895 "Rondeau Brilliant": Andante - Allegro
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Fantasia in F Minor for Piano Duet, Op. 103, D. 940: IV. Tempo I
type: MusicRecording
duration: PT5M42S
duration ms: 342064
explicit: false
by artist: Franz Schubert
by artist: Julia Fischer
by artist: Martin Helmchen
in album: Schubert Complete Works for Violin and Piano
  type: MusicAlbum
  date published: 2009-08-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: NLE420900212
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9deca100b1b8ec22efdf51d9701a706fe898606768d59c83d4941c2ecc5ba57c. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900212 — a six-check JSON result.
  date published: 2026-07-07T20:41:57Z
audio: Fantasia in F Minor for Piano Duet, Op. 103, D. 940: IV. Tempo I
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Intimate
type: MusicAlbum
date published: 2020-07-24
track: Fantasy in C Major, Op. 159, D. 934: I. Andante molto
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  duration: PT3M22S
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  by artist: Franz Schubert
  by artist: Julia Fischer
  by artist: Martin Helmchen
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    type: MusicAlbum
    date published: 2020-07-24
  genre: classical
  genre: classical-piano
  genre: chamber-music
  isrc code: NLE420900205
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
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  additional property: OTSBitcoinBlock
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900205
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47eae4b73e3fc3fa9ea7ce4eb371861b30b8d91130e18c41378b93232b890bfd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420900205 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Fantasy in C Major, Op. 159, D. 934: I. Andante molto
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    additional property: Mode (Major/Minor)
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    additional property: Danceability
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    additional property: Energy
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    additional property: Acousticness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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track: Souvenir d'un lieu cher, Op. 42, TH 116: No. 3, Mélodie
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  duration: PT3M22S
  duration ms: 202226
  explicit: false
  by artist: Pyotr Ilyich Tchaikovsky
  by artist: Julia Fischer
  by artist: Yakov Kreizberg
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421807408
  additional property: OTSTimestamp
    type: PropertyValue
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b2b6085f93649045cab2765e4c5b463f77c0dfe8e6a2f89e26c0ddb6dfa7a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE421807408 — a six-check JSON result.
    date published: 2026-07-31T03:15:04Z
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    additional property: Musical Key
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    additional property: Danceability
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    additional property: Energy
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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Violin Duos
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date published: 2023-06-02
track: 5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 1, Prelude. Moderato
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  by artist: Dmitri Shostakovich
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  by artist: Kirill Troussov
  by artist: Henri Bonamy
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    date published: 2023-06-02
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  additional property: OTSBitcoinBlock
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  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
    type: PropertyValue
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1cfb95cda2d26123a06503913d8d94b2bcca7b0efabca2d118384e0825107d6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300144 — a six-check JSON result.
    date published: 2026-06-13T17:25:41Z
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    additional property: Mode (Major/Minor)
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Valence (Positivity)
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track: 5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 2, Gavotte. Tranquillo, molto leggiero
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c8375f161f671de9320bdb18e8f49b52907b952a4b45ff221fd23bdea82dee. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300145 — a six-check JSON result.
    date published: 2026-07-22T16:43:41Z
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    additional property: Tempo (BPM)
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    additional property: Danceability
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
      type: PropertyValue
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track: 5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 3, Elegy. Andantino
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  by artist: Dmitri Shostakovich
  by artist: Julia Fischer
  by artist: Kirill Troussov
  by artist: Henri Bonamy
  in album: Violin Duos
    type: MusicAlbum
    date published: 2023-06-02
  isrc code: GBYDS2300146
  additional property: CopyrightID
  additional property: CopyrightStatus
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  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: 5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 3, Elegy. Andantino
track: 5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 4, Waltz. Tempo di valse, moderato
track: 5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 5, Polka. Vivace
track: Sonata for 2 Violins in C Major, Op. 56: I. Andante cantabile
track: Sonata for 2 Violins in C Major, Op. 56: II. Allegro
track: Sonata for 2 Violins in C Major, Op. 56: III. Commodo, quasi allegretto
track: Sonata for 2 Violins in C Major, Op. 56: IV. Allegro con brio

OTSHash
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OTSBitcoinBlock
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OTSBitcoinBlockVerifyURL
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value: https://blockstream.info/api/block-height/956304

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300146

OTSTimestamp
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value: 2026-07-02T03:55:08Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600accd22bcd40c205b839106268ae8d0006c7241f72446f7a033251c222dd3a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300146 — a six-check JSON result.
date published: 2026-07-02T03:55:08Z

5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 3, Elegy. Andantino
type: AudioObject
additional property: Tempo (BPM)
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additional property: Musical Key
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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additional property: Danceability
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additional property: Energy
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additional property: Speechiness
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additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
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additional property: Valence (Positivity)
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additional property: Loudness (dB)
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additional property: Key Name
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additional property: Mode Name
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5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 4, Waltz. Tempo di valse, moderato
type: MusicRecording
duration: PT1M36S
duration ms: 96306
explicit: false
by artist: Dmitri Shostakovich
by artist: Julia Fischer
by artist: Kirill Troussov
by artist: Henri Bonamy
in album: Violin Duos
  type: MusicAlbum
  date published: 2023-06-02
isrc code: GBYDS2300147
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957819
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300147
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-13T07:53:33Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7af6a356ab2423c48801858dc726f7c4d68924e678db0c8a76063e06e92ce3. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300147 — a six-check JSON result.
  date published: 2026-07-13T07:53:33Z
audio: 5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 4, Waltz. Tempo di valse, moderato
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 5, Polka. Vivace
type: MusicRecording
duration: PT1M25S
duration ms: 85357
explicit: false
by artist: Dmitri Shostakovich
by artist: Julia Fischer
by artist: Kirill Troussov
by artist: Henri Bonamy
in album: Violin Duos
  type: MusicAlbum
  date published: 2023-06-02
isrc code: GBYDS2300148
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-25T18:28:41+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x862d064e69c4b5c353326910382f09deec98004623781f6bcb90e70c88d3fca8
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300148
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862d064e69c4b5c353326910382f09deec98004623781f6bcb90e70c88d3fca8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300148 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: 5 Pieces for 2 Violins & Piano (Arr. for 2 Violins & Piano by Lev Atovmyan): No. 5, Polka. Vivace
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Sonata for 2 Violins in C Major, Op. 56: I. Andante cantabile
type: MusicRecording
duration: PT2M55S
duration ms: 175194
explicit: false
by artist: Sergei Prokofiev
by artist: Julia Fischer
by artist: Kirill Troussov
in album: Violin Duos
  type: MusicAlbum
  date published: 2023-06-02
genre: classical
genre: orchestra
genre: neoclassical
isrc code: GBYDS2300149
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0491f62fd6215fa17b10f3b430bde8ef8357f26b375f7529be2df63a12d4db15. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300149 — a six-check JSON result.
  date published: 2026-07-30T14:36:16Z
audio: Sonata for 2 Violins in C Major, Op. 56: I. Andante cantabile
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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Sonata for 2 Violins in C Major, Op. 56: II. Allegro
type: MusicRecording
duration: PT3M6S
duration ms: 186244
explicit: false
by artist: Sergei Prokofiev
by artist: Julia Fischer
by artist: Kirill Troussov
in album: Violin Duos
  type: MusicAlbum
  date published: 2023-06-02
genre: classical
genre: orchestra
genre: neoclassical
isrc code: GBYDS2300150
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37896f99997b9cb62e42c3da213faf52c8ea4bd37161504fbfc30afc1f7d9459. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300150 — a six-check JSON result.
  date published: 2026-07-30T09:57:33Z
audio: Sonata for 2 Violins in C Major, Op. 56: II. Allegro
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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  additional property: Mode Name
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Sonata for 2 Violins in C Major, Op. 56: III. Commodo, quasi allegretto
type: MusicRecording
duration: PT3M55S
duration ms: 235876
explicit: false
by artist: Sergei Prokofiev
by artist: Julia Fischer
by artist: Kirill Troussov
in album: Violin Duos
  type: MusicAlbum
  date published: 2023-06-02
genre: classical
genre: orchestra
genre: neoclassical
isrc code: GBYDS2300151
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T07:44:55+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300151
additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef323ae056438569c35a50b9f4a18ad9bfcb1041f0645437f6df53b3b6f49c1. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBYDS2300151 — a six-check JSON result.
  date published: 2026-07-31T08:26:41Z
audio: Sonata for 2 Violins in C Major, Op. 56: III. Commodo, quasi allegretto
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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Der Geschmack unseres Lebens
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track: Duo No. 1 in G Major for Violin and Viola, K. 423: I. Allegro
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track: London Sketchbook No. 15: Intermezzo for Viola and Piano, K. Anh. 109b, No. 3
track: London Sketchbook No. 16: Duo for Clarinet and Viola, K. 15q
track: London Sketchbook No. 23: Trio for Clarinet, Viola and Piano, K. Anh. 109b, No. 6
track: Variations for Piano and Viola on "Hélas, j'ai perdu mon amant", K. 360

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Sonata for Piano and Viola in C Major, K. 14: III. Menuetto primo - Menuetto secondo en Carillon
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by artist: Nils Mönkemeyer
by artist: William Youn
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genre: classical-era
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Duo No. 1 in G Major for Violin and Viola, K. 423: I. Allegro
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by artist: Julia Fischer
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Duo No. 1 in G Major for Violin and Viola, K. 423: II. Adagio
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by artist: Julia Fischer
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T14:36:16Z
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Duo No. 1 in G Major for Violin and Viola, K. 423: III. Rondeau Allegro
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additional property: OTSTimestamp
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Sonata for Piano and Viola in F Major, K. 30: I. Adagio
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by artist: Nils Mönkemeyer
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Sonata for Piano and Viola in F Major, K. 30: II. Rondo. Tempo di Menuetto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Modulating Prelude in F Major / E Minor, K. deest
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861600079
additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee6eff46d4c34658b00a490e0c0876ccf8d8607c84e368971e5299de415bc06. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861600079 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Modulating Prelude in F Major / E Minor, K. deest
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London Sketchbook No. 32: Duo for Violin and Viola, K. 15gg
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duration: PT0M51S
duration ms: 51213
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Nils Mönkemeyer
by artist: Julia Fischer
in album: Mozart with Friends
  type: MusicAlbum
  date published: 2016-04-08
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861600080
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e7fb671a9704bdeab04a7a3c832d7b9c0e96d280c7b35d952cc9cbe671263c. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861600080 — a six-check JSON result.
  date published: 2026-07-31T09:50:11Z
audio: London Sketchbook No. 32: Duo for Violin and Viola, K. 15gg
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London Sketchbook No. 15: Intermezzo for Viola and Piano, K. Anh. 109b, No. 3
type: MusicRecording
duration: PT2M17S
duration ms: 137960
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Nils Mönkemeyer
by artist: William Youn
in album: Mozart with Friends
  type: MusicAlbum
  date published: 2016-04-08
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861600081
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e7377540f462b6be2542a4b314d753bda07703e800fefbbadf52b8eb0b0b4a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861600081 — a six-check JSON result.
  date published: 2026-07-31T02:19:15Z
audio: London Sketchbook No. 15: Intermezzo for Viola and Piano, K. Anh. 109b, No. 3
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London Sketchbook No. 16: Duo for Clarinet and Viola, K. 15q
type: MusicRecording
duration: PT2M36S
duration ms: 156840
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Nils Mönkemeyer
by artist: Sabine Meyer
in album: Mozart with Friends
  type: MusicAlbum
  date published: 2016-04-08
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861600082
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7536be56d98e8d42e029912ec15a42eee7e0097263c39665c7c3643f77a4d0c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861600082 — a six-check JSON result.
  date published: 2026-07-30T14:36:16Z
audio: London Sketchbook No. 16: Duo for Clarinet and Viola, K. 15q
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London Sketchbook No. 23: Trio for Clarinet, Viola and Piano, K. Anh. 109b, No. 6
type: MusicRecording
duration: PT0M55S
duration ms: 55040
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Nils Mönkemeyer
by artist: Sabine Meyer
by artist: William Youn
in album: Mozart with Friends
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  date published: 2016-04-08
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861600083
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4288146d83582f83b8960e95bf23b367e78eb1fbe8abe52240d83a87aea09b5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861600083 — a six-check JSON result.
  date published: 2026-07-31T00:26:26Z
audio: London Sketchbook No. 23: Trio for Clarinet, Viola and Piano, K. Anh. 109b, No. 6
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  additional property: Danceability
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  additional property: Valence (Positivity)
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Variations for Piano and Viola on "Hélas, j'ai perdu mon amant", K. 360
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duration: PT11M25S
duration ms: 685840
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Nils Mönkemeyer
by artist: William Youn
in album: Mozart with Friends
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  date published: 2016-04-08
genre: classical
genre: classical-era
genre: classical-piano
genre: opera
genre: chamber-music
genre: concerto
isrc code: DEE861600084
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759fde161426226e48e538217eb4a93d8751a8646eb6c1a48809517e07f51287. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE861600084 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Variations for Piano and Viola on "Hélas, j'ai perdu mon amant", K. 360
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Sehnsucht auf blauem Papier
type: MusicAlbum
date published: 2014

Sarasate
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date published: 2013-01-01
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
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    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec96511ef2a6f52e2692879d4988e750c4ef27c1e7cf4a62144ba4dcde6a1951. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302411 — a six-check JSON result.
    date published: 2026-07-29T19:35:34Z
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    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.312
    additional property: Energy
      type: PropertyValue
      value: 0.065
    additional property: Speechiness
      type: PropertyValue
      value: 0.051
    additional property: Acousticness
      type: PropertyValue
      value: 0.97
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.281
    additional property: Liveness
      type: PropertyValue
      value: 0.095
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.146
    additional property: Loudness (dB)
      type: PropertyValue
      value: -27.048
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Danzas Españolas, Op. 26: No. 8 in C major - Habanera, Op. 26 No. 2
  type: MusicRecording
  duration: PT4M59S
  duration ms: 299506
  explicit: false
  by artist: Pablo de Sarasate
  by artist: Julia Fischer
  by artist: Milana Chernyavska
  in album: Sarasate
    type: MusicAlbum
    date published: 2013-01-01
  isrc code: GBF071302412
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T19:29:21+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x5d6f854bfbedb7bee2350e9a8525baa92d23168d7d248e2e21e3a662ad95274d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302412
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6f854bfbedb7bee2350e9a8525baa92d23168d7d248e2e21e3a662ad95274d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302412 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Danzas Españolas, Op. 26: No. 8 in C major - Habanera, Op. 26 No. 2
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 121.87
    additional property: Musical Key
      type: PropertyValue
      value: 7
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.525
    additional property: Energy
      type: PropertyValue
      value: 0.207
    additional property: Speechiness
      type: PropertyValue
      value: 0.054
    additional property: Acousticness
      type: PropertyValue
      value: 0.976
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.183
    additional property: Liveness
      type: PropertyValue
      value: 0.087
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.534
    additional property: Loudness (dB)
      type: PropertyValue
      value: -20.909
    additional property: Key Name
      type: PropertyValue
      value: G
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Jota Aragonesa, Op. 27
  type: MusicRecording
  duration: PT4M47S
  duration ms: 287746
  explicit: false
  by artist: Pablo de Sarasate
  by artist: Julia Fischer
  by artist: Milana Chernyavska
  in album: Sarasate
    type: MusicAlbum
    date published: 2013-01-01
  isrc code: GBF071302420
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-06T22:08:05+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x19fa961f13ea0b0dd816701c32016479ed3b84d02dffb5e4ad69d14e4579bcb9
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Jota Aragonesa, Op. 27
track: Serenata Andaluza, Op. 28
track: El Canto del ruiseñor, Op. 29
track: Danzas Españolas, Op. 21: No. 1 - Malagueña, Op. 21 No. 1
track: Danzas Españolas, Op. 21: No. 2 - Habanera, Op. 21 No. 2
track: Danzas Españolas, Op. 22: No. 3 - Romanza Andaluza, Op. 22 No. 1
track: Danzas Españolas, Op. 22: No. 4 - Jota Navarra, Op. 22 No. 2
track: Danzas Españolas, Op. 23: No. 5 - Playera, Op. 23 No. 1
track: Danzas Españolas, Op. 23: No. 6 - Zapateado, Op. 23 No. 2
track: Caprice Basque, Op. 24
track: Zigeunerweisen (Aires Gitanos), Op. 20

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/957118

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302420

OTSTimestamp
type: PropertyValue
value: 2026-07-08T03:20:19Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fa961f13ea0b0dd816701c32016479ed3b84d02dffb5e4ad69d14e4579bcb9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302420 — a six-check JSON result.
date published: 2026-07-08T03:20:19Z

Jota Aragonesa, Op. 27
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 125.524
additional property: Musical Key
  type: PropertyValue
  value: 2
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.556
additional property: Energy
  type: PropertyValue
  value: 0.184
additional property: Speechiness
  type: PropertyValue
  value: 0.047
additional property: Acousticness
  type: PropertyValue
  value: 0.965
additional property: Instrumentalness
  type: PropertyValue
  value: 0.263
additional property: Liveness
  type: PropertyValue
  value: 0.197
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.614
additional property: Loudness (dB)
  type: PropertyValue
  value: -22.582
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
  value: Major

Serenata Andaluza, Op. 28
type: MusicRecording
duration: PT6M2S
duration ms: 362693
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
  type: MusicAlbum
  date published: 2013-01-01
isrc code: GBF071302430
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T18:48:23+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x76f95fb32d1a933e4a6e97d5c5a2e9bba06b1f1ee32fd9956c10e677786cbd7e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302430
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f95fb32d1a933e4a6e97d5c5a2e9bba06b1f1ee32fd9956c10e677786cbd7e. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302430 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Serenata Andaluza, Op. 28
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 115.079
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.381
  additional property: Energy
    type: PropertyValue
    value: 0.124
  additional property: Speechiness
    type: PropertyValue
    value: 0.049
  additional property: Acousticness
    type: PropertyValue
    value: 0.953
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.37
  additional property: Liveness
    type: PropertyValue
    value: 0.061
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.309
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23.828
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major

El Canto del ruiseñor, Op. 29
type: MusicRecording
duration: PT8M24S
duration ms: 504026
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
  type: MusicAlbum
  date published: 2013-01-01
isrc code: GBF071302440
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T21:50:18+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x65928e03f7f3a85d38af7715c07a6bcbc71258e730bf543d036e0b26fe71ac88
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960321
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960321
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302440
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T22:27:30Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65928e03f7f3a85d38af7715c07a6bcbc71258e730bf543d036e0b26fe71ac88. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302440 — a six-check JSON result.
  date published: 2026-07-30T22:27:30Z
audio: El Canto del ruiseñor, Op. 29
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 101.638
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.273
  additional property: Energy
    type: PropertyValue
    value: 0.035
  additional property: Speechiness
    type: PropertyValue
    value: 0.051
  additional property: Acousticness
    type: PropertyValue
    value: 0.944
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.061
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.069
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.114
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Danzas Españolas, Op. 21: No. 1 - Malagueña, Op. 21 No. 1
type: MusicRecording
duration: PT4M17S
duration ms: 257240
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
  type: MusicAlbum
  date published: 2013-01-01
isrc code: GBF071302371
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T05:20:27+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x882de1ad976b82897fe7869b5db64582d9f843e8b08ac5aa114a9e3f8f30402f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960212
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960212
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302371
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T05:43:45Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882de1ad976b82897fe7869b5db64582d9f843e8b08ac5aa114a9e3f8f30402f. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302371 — a six-check JSON result.
  date published: 2026-07-30T05:43:45Z
audio: Danzas Españolas, Op. 21: No. 1 - Malagueña, Op. 21 No. 1
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 111.097
  additional property: Musical Key
    type: PropertyValue
    value: 2
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.275
  additional property: Energy
    type: PropertyValue
    value: 0.084
  additional property: Speechiness
    type: PropertyValue
    value: 0.053
  additional property: Acousticness
    type: PropertyValue
    value: 0.971
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.366
  additional property: Liveness
    type: PropertyValue
    value: 0.072
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.255
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.302
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Major

Danzas Españolas, Op. 21: No. 2 - Habanera, Op. 21 No. 2
type: MusicRecording
duration: PT4M12S
duration ms: 252920
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
  type: MusicAlbum
  date published: 2013-01-01
isrc code: GBF071302372
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-06T06:47:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf216603c7503e419fa014415bd8e57cdf0371d503f7d47453c06a43d766c5db3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956889
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956889
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302372
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-06T06:56:49Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf216603c7503e419fa014415bd8e57cdf0371d503f7d47453c06a43d766c5db3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302372 — a six-check JSON result.
  date published: 2026-07-06T06:56:49Z
audio: Danzas Españolas, Op. 21: No. 2 - Habanera, Op. 21 No. 2
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 96.577
  additional property: Musical Key
    type: PropertyValue
    value: 4
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.495
  additional property: Energy
    type: PropertyValue
    value: 0.102
  additional property: Speechiness
    type: PropertyValue
    value: 0.053
  additional property: Acousticness
    type: PropertyValue
    value: 0.962
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.044
  additional property: Liveness
    type: PropertyValue
    value: 0.098
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.359
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.497
  additional property: Key Name
    type: PropertyValue
    value: E
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Danzas Españolas, Op. 22: No. 3 - Romanza Andaluza, Op. 22 No. 1
type: MusicRecording
duration: PT4M17S
duration ms: 257573
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
  type: MusicAlbum
  date published: 2013-01-01
isrc code: GBF071302381
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T01:46:31+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x83a10ab85a18a038b94dd7906172ac7bdee407318ce83880badb0bf9d77638c9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960193
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960193
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302381
additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T02:05:19Z
audio: Danzas Españolas, Op. 22: No. 3 - Romanza Andaluza, Op. 22 No. 1
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  additional property: Key Name
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    value: C
  additional property: Mode Name
    type: PropertyValue
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Danzas Españolas, Op. 22: No. 4 - Jota Navarra, Op. 22 No. 2
type: MusicRecording
duration: PT4M32S
duration ms: 272986
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  date published: 2026-07-30T12:45:34Z
audio: Danzas Españolas, Op. 22: No. 4 - Jota Navarra, Op. 22 No. 2
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Danzas Españolas, Op. 23: No. 5 - Playera, Op. 23 No. 1
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duration: PT4M6S
duration ms: 246413
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
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isrc code: GBF071302391
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33155f1d5a443f843dc45e41fd410ad0ef9b1acf90371c2865ade6ffa11f24f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302391 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Danzas Españolas, Op. 23: No. 5 - Playera, Op. 23 No. 1
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Danzas Españolas, Op. 23: No. 6 - Zapateado, Op. 23 No. 2
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duration: PT3M13S
duration ms: 193880
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
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isrc code: GBF071302392
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e334dc3c4211392433353b989fc70f8e0df1f5e41ba16bd2baaf1d00724733. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302392 — a six-check JSON result.
  date published: 2026-07-07T18:39:05Z
audio: Danzas Españolas, Op. 23: No. 6 - Zapateado, Op. 23 No. 2
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Caprice Basque, Op. 24
type: MusicRecording
duration: PT5M56S
duration ms: 356840
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
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isrc code: GBF071302400
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-07-06T06:56:49Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T06:56:49Z
audio: Caprice Basque, Op. 24
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Zigeunerweisen (Aires Gitanos), Op. 20
type: MusicRecording
duration: PT7M52S
duration ms: 472800
explicit: false
by artist: Pablo de Sarasate
by artist: Julia Fischer
by artist: Milana Chernyavska
in album: Sarasate
  type: MusicAlbum
  date published: 2013-01-01
isrc code: GBF071302360
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974237319590a37dd0eb204ec64c42a3861e0887902fe4ccb8fa370aec95cd89. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF071302360 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Zigeunerweisen (Aires Gitanos), Op. 20
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  additional property: Mode Name
    type: PropertyValue
    value: Minor

Paganini: 24 Caprices, Op.1
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date published: 2010-01-01
track: 24 Caprices for Solo Violin, Op. 1, MS 25: No. 1 in E Major "L'arpeggio". Andante
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  duration: PT1M46S
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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    additional property: Danceability
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track: 24 Caprices for Solo Violin, Op. 1, MS 25: No. 2 in B Minor. Moderato
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track: 24 Caprices for Solo Violin, Op. 1, MS 25: No. 13 in B-Flat Major "The Devil's Laughter". Allegro
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track: Three Paganini Caprices, Op. 40: 3. Caprice No. 24

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24 Caprices for Solo Violin, Op. 1, MS 25: No. 4 in C Minor. Maestoso
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subject of: OpenTimestamps Proof of Existence
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 5 in A Minor. Agitato
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 6 in G Minor "The Trill". Adagio
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 7 in A Minor. Posato
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 9 in E Major "La chasse". Allegretto
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 10 in G Minor. Vivace
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 11 in C Major. Andante – Presto
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  date published: 2026-07-08T03:20:19Z
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 13 in B-Flat Major "The Devil's Laughter". Allegro
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 16 in G Minor. Presto
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 17 in E-Flat Major. Sostenuto – Andante
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24 Caprices for Solo Violin, Op. 1, MS 25: No. 24 in A Minor. Tema con variazioni. Quasi presto
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Three Paganini Caprices, Op. 40: 3. Caprice No. 24
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T13:04:34Z
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date published: 2026-07-02T03:55:08Z

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subject of: OpenTimestamps Proof of Existence
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  subject of: OpenTimestamps Proof of Existence
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:55:08Z
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  subject of: OpenTimestamps Proof of Existence
  audio: Sinfonia concertante for Violin, Viola and Orchestra in E-Flat Major, K. 364: III. Presto
track: Rondo in C Major, K. 373
track: Concertone in C Major, K. 190: I. Allegro spiritoso
track: Concertone in C Major, K. 190: II. Andantino grazioso
track: Concertone in C Major, K. 190: III. Tempo minuetto. Vivace

Yakov Kreizberg
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Mozart: Sinfonia concertante, Rondo & Concertone
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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
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OTSTimestamp
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OTSVerifyInstructions
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OpenTimestamps Proof of Existence
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date published: 2026-07-30T14:53:07Z

Sinfonia concertante for Violin, Viola and Orchestra in E-Flat Major, K. 364: III. Presto
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Rondo in C Major, K. 373
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by artist: Wolfgang Amadeus Mozart
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by artist: Julia Fischer
by artist: Yakov Kreizberg
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T10:20:10Z
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Concertone in C Major, K. 190: I. Allegro spiritoso
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by artist: Wolfgang Amadeus Mozart
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by artist: Netherlands Chamber Orchestra
by artist: Yakov Kreizberg
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genre: classical-era
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T15:42:38Z
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Concertone in C Major, K. 190: II. Andantino grazioso
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by artist: Wolfgang Amadeus Mozart
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by artist: Netherlands Chamber Orchestra
by artist: Yakov Kreizberg
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genre: classical
genre: classical-era
genre: classical-piano
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:19:15Z
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Concertone in C Major, K. 190: III. Tempo minuetto. Vivace
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by artist: Yakov Kreizberg
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Brahms: Violin Concerto & Double Concerto
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date published: 2007-04-01
track: Violin Concerto in D Major, Op. 77: I. Allegro non troppo
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track: Double Concerto for Violin and Cello in A Minor, Op. 102: I. Allegro
track: Double Concerto for Violin and Cello in A Minor, Op. 102: II. Andante
track: Double Concerto for Violin and Cello in A Minor, Op. 102: III. Vivace non troppo

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Double Concerto for Violin and Cello in A Minor, Op. 102: I. Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T18:39:05Z
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Double Concerto for Violin and Cello in A Minor, Op. 102: II. Andante
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Double Concerto for Violin and Cello in A Minor, Op. 102: III. Vivace non troppo
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    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600101
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T15:41:10Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617f9ca0c5a683b7db296b66711a4224b221331a3a53a6fc3fbf5bb1a7f9a985. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600101 — a six-check JSON result.
    date published: 2026-06-13T15:41:10Z
  audio: Violin Concerto in D Major, Op. 35, TH 59: I. Allegro moderato
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.283
    additional property: Energy
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      value: 0.093
    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.897
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.112
    additional property: Liveness
      type: PropertyValue
      value: 0.094
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.12
    additional property: Loudness (dB)
      type: PropertyValue
      value: -25.759
    additional property: Key Name
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      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Violin Concerto in D Major, Op. 35, TH 59: II. Canzonetta. Andante
  type: MusicRecording
  duration: PT6M44S
  duration ms: 404908
  explicit: false
  by artist: Pyotr Ilyich Tchaikovsky
  by artist: Julia Fischer
  by artist: Yakov Kreizberg
  by artist: Russian National Orchestra
  in album: Tchaikovsky: Violin Concerto
    type: MusicAlbum
    date published: 2006-10-01
  isrc code: NLE420600102
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-19T13:31:34+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc500e77efc92a0d9950edddd686251e9754585a3aaa170c2b0a85f5e3433ccda
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956302
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956302
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600102
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:30:09Z
  additional property: OTSVerifyInstructions
    type: PropertyValue
    value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc500e77efc92a0d9950edddd686251e9754585a3aaa170c2b0a85f5e3433ccda. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600102 — a six-check JSON result.
    date published: 2026-07-02T03:30:09Z
  audio: Violin Concerto in D Major, Op. 35, TH 59: II. Canzonetta. Andante
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Mode (Major/Minor)
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    additional property: Time Signature
      type: PropertyValue
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    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
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    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
      type: PropertyValue
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    additional property: Instrumentalness
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    additional property: Liveness
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    additional property: Valence (Positivity)
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      value: 0.037
    additional property: Loudness (dB)
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    additional property: Key Name
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    additional property: Mode Name
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track: Violin Concerto in D Major, Op. 35, TH 59: III. Finale (Allegro vivacissimo)
  type: MusicRecording
  duration: PT10M10S
  duration ms: 610905
  explicit: false
  by artist: Pyotr Ilyich Tchaikovsky
  by artist: Julia Fischer
  by artist: Yakov Kreizberg
  by artist: Russian National Orchestra
  in album: Tchaikovsky: Violin Concerto
    type: MusicAlbum
    date published: 2006-10-01
  isrc code: NLE420600103
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-05T17:19:10+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x25cab4e814d711ea5071b179d435c8d0f6b0101a1b361fc65614782d300dc6c6
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Violin Concerto in D Major, Op. 35, TH 59: III. Finale (Allegro vivacissimo)
track: Sérénade mélancolique, Op. 26, TH 56 for violin and orchestra
track: Valse-Scherzo, Op. 34, TH 58 for violin and orchestra
track: Souvenir d'un lieu cher, Op. 42, TH 116: No. 1, Meditation
track: Souvenir d'un lieu cher, Op. 42, TH 116: No. 2, Scherzo
track: Souvenir d'un lieu cher, Op. 42, TH 116: No. 3, Mélodie

OTSHash
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OTSBitcoinBlock
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value: 953513

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/953513

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600103

OTSTimestamp
type: PropertyValue
value: 2026-06-13T12:47:07Z

OTSVerifyInstructions
type: PropertyValue
value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25cab4e814d711ea5071b179d435c8d0f6b0101a1b361fc65614782d300dc6c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600103 — a six-check JSON result.
date published: 2026-06-13T12:47:07Z

Violin Concerto in D Major, Op. 35, TH 59: III. Finale (Allegro vivacissimo)
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
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additional property: Musical Key
  type: PropertyValue
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additional property: Mode (Major/Minor)
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  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.361
additional property: Energy
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additional property: Speechiness
  type: PropertyValue
  value: 0.046
additional property: Acousticness
  type: PropertyValue
  value: 0.92
additional property: Instrumentalness
  type: PropertyValue
  value: 0.356
additional property: Liveness
  type: PropertyValue
  value: 0.114
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.189
additional property: Loudness (dB)
  type: PropertyValue
  value: -26.958
additional property: Key Name
  type: PropertyValue
  value: D
additional property: Mode Name
  type: PropertyValue
  value: Major

Sérénade mélancolique, Op. 26, TH 56 for violin and orchestra
type: MusicRecording
duration: PT9M33S
duration ms: 573320
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Julia Fischer
by artist: Yakov Kreizberg
by artist: Russian National Orchestra
in album: Tchaikovsky: Violin Concerto
  type: MusicAlbum
  date published: 2006-10-01
isrc code: NLE420600104
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-24T16:23:02+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1d7bb5aa28eee2409507c12d5c4ba5a732f756a07db6787735dac45635cebb35
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956312
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956312
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600104
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T05:09:12Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d7bb5aa28eee2409507c12d5c4ba5a732f756a07db6787735dac45635cebb35. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600104 — a six-check JSON result.
  date published: 2026-07-02T05:09:12Z
audio: Sérénade mélancolique, Op. 26, TH 56 for violin and orchestra
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 96.354
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
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    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.106
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.039
  additional property: Loudness (dB)
    type: PropertyValue
    value: -30.786
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Valse-Scherzo, Op. 34, TH 58 for violin and orchestra
type: MusicRecording
duration: PT7M54S
duration ms: 474040
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Julia Fischer
by artist: Yakov Kreizberg
by artist: Russian National Orchestra
in album: Tchaikovsky: Violin Concerto
  type: MusicAlbum
  date published: 2006-10-01
isrc code: NLE420600105
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-27T06:54:06+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x55c90422e9636db04e7e5afda38076df111e39b7c2f7cb75086df0f8828425d2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600105
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c90422e9636db04e7e5afda38076df111e39b7c2f7cb75086df0f8828425d2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600105 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Valse-Scherzo, Op. 34, TH 58 for violin and orchestra
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 137.156
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.432
  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
    value: 0.047
  additional property: Acousticness
    type: PropertyValue
    value: 0.894
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.284
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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  additional property: Mode Name
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Souvenir d'un lieu cher, Op. 42, TH 116: No. 1, Meditation
type: MusicRecording
duration: PT9M17S
duration ms: 557506
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Julia Fischer
by artist: Yakov Kreizberg
in album: Tchaikovsky: Violin Concerto
  type: MusicAlbum
  date published: 2006-10-01
isrc code: NLE420600106
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-27T06:57:20+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe3aa7f9508950ee501ff07ae60f153a8d15030cdb3d3eaf78775c8f350d917f6
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 956304
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600106
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aa7f9508950ee501ff07ae60f153a8d15030cdb3d3eaf78775c8f350d917f6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600106 — a six-check JSON result.
  date published: 2026-07-02T03:55:08Z
audio: Souvenir d'un lieu cher, Op. 42, TH 116: No. 1, Meditation
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 140.857
  additional property: Musical Key
    type: PropertyValue
    value: 10
  additional property: Mode (Major/Minor)
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    value: 1
  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.446
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Souvenir d'un lieu cher, Op. 42, TH 116: No. 2, Scherzo
type: MusicRecording
duration: PT3M15S
duration ms: 195226
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Julia Fischer
by artist: Yakov Kreizberg
in album: Tchaikovsky: Violin Concerto
  type: MusicAlbum
  date published: 2006-10-01
isrc code: NLE420600107
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T00:45:53+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x864cad8ff60e150ae6a6fbfcda3204343165067729a6e4b3e61a3c3e87457926
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960181
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600107
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T00:53:20Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864cad8ff60e150ae6a6fbfcda3204343165067729a6e4b3e61a3c3e87457926. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLE420600107 — a six-check JSON result.
  date published: 2026-07-30T00:53:20Z
audio: Souvenir d'un lieu cher, Op. 42, TH 116: No. 2, Scherzo
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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Souvenir d'un lieu cher, Op. 42, TH 116: No. 3, Mélodie
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
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Mozart: Violin Concertos 1, 2 & 5
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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track: Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
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  subject of: OpenTimestamps Proof of Existence
  audio: Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
track: Violin Concerto No. 2 in D Major, K. 211: I. Allegro Moderato
track: Violin Concerto No. 2 in D Major, K. 211: II. Andante

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OTSVerifyInstructions
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OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:20:19Z

Violin Concerto No. 1 in B-Flat Major, K. 207: III. Presto
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Violin Concerto No. 2 in D Major, K. 211: I. Allegro Moderato
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duration ms: 476066
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by artist: Wolfgang Amadeus Mozart
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by artist: Yakov Kreizberg
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T12:24:41Z
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Violin Concerto No. 2 in D Major, K. 211: II. Andante
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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