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  track: Rachmaninoff: Piano Concerto No. 3 in D Minor, Op. 30: I. Allegro ma non tanto - Live
  track: Rachmaninoff: Piano Concerto No. 3 in D Minor, Op. 30: II. Intermezzo – Adagio - Live
  track: Rachmaninoff: Piano Concerto No. 3 in D Minor, Op. 30: III. Finale – Alla breve - Live
  track: Glinka: The Lark (L'Alouette, arr. Mily Balkirev) - Live
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  track: Rachmaninoff: Piano Concerto No. 1 in C Minor, Op. 1 : III. Allegro vivace (1917 Revised Version) - Live
  track: Rachmaninoff: Piano Concerto No. 4 in G Minor, Op. 40 : I. Allegro vivace - alla breve (1941 Revised Version) - Live
  track: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 4. Più vivo - Live
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  track: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 7. Meno mosso, a tempo moderato - Live
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  track: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 12. Tempo di minuetto - Live
  track: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 18. Andante cantabile - Live
album: Rachmaninoff: Symphonic Dances & Pletnev: Rachmaniana

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Rachmaninoff: Piano Concerto No. 3 in D Minor, Op. 30: III. Finale – Alla breve - Live
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Glinka: The Lark (L'Alouette, arr. Mily Balkirev) - Live
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subject of: OpenTimestamps Proof of Existence
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Rachmaninoff: Piano Concerto No. 1 in C Minor, Op. 1: II. Andante (1917 Revised Version) - Live
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  date published: 2026-07-31T21:25:57Z
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Rachmaninoff: Piano Concerto No. 1 in C Minor, Op. 1 : III. Allegro vivace (1917 Revised Version) - Live
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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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Rachmaninoff: Piano Concerto No. 4 in G Minor, Op. 40 : I. Allegro vivace - alla breve (1941 Revised Version) - Live
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subject of: OpenTimestamps Proof of Existence
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Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 4. Più vivo - Live
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502504
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 0x5d6d8776d69d72b0b32224e2cecea2e55ebbbc59c5edc601057487827be69483. 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/DEU901502504 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 5. Tempo precedente - Live
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 143.873
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.756
  additional property: Energy
    type: PropertyValue
    value: 0.087
  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  additional property: Acousticness
    type: PropertyValue
    value: 0.984
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.768
  additional property: Liveness
    type: PropertyValue
    value: 0.175
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.781
  additional property: Loudness (dB)
    type: PropertyValue
    value: -28.275
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 6. L'istesso tempo - Live
type: MusicRecording
duration: PT0M59S
duration ms: 59680
explicit: false
by artist: Sergei Rachmaninoff
by artist: Rachmaninoff International Orchestra
by artist: Mikhail Pletnev
by artist: Kent Nagano
in album: Rachmaninoff Live – The Piano Concertos & The Paganini Rhapsody
  type: MusicAlbum
  date published: 2024-04-26
popularity: 2
genre: classical
genre: classical-piano
genre: concerto
isrc code: DEU901502505
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T10:52:46+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x41a9d64932f9d86cafb84b6a007c69b1ef9414bb8464766c52dd9303a0fbe2dd
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/DEU901502505
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 0x41a9d64932f9d86cafb84b6a007c69b1ef9414bb8464766c52dd9303a0fbe2dd. 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/DEU901502505 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 6. L'istesso tempo - Live
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 140.281
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.353
  additional property: Energy
    type: PropertyValue
    value: 0.042
  additional property: Speechiness
    type: PropertyValue
    value: 0.042
  additional property: Acousticness
    type: PropertyValue
    value: 0.992
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.781
  additional property: Liveness
    type: PropertyValue
    value: 0.289
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.306
  additional property: Loudness (dB)
    type: PropertyValue
    value: -31.145
  additional property: Key Name
    type: PropertyValue
    value: A
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 7. Meno mosso, a tempo moderato - Live
type: MusicRecording
duration: PT1M0S
duration ms: 60106
explicit: false
by artist: Sergei Rachmaninoff
by artist: Rachmaninoff International Orchestra
by artist: Mikhail Pletnev
by artist: Kent Nagano
in album: Rachmaninoff Live – The Piano Concertos & The Paganini Rhapsody
  type: MusicAlbum
  date published: 2024-04-26
popularity: 1
genre: classical
genre: classical-piano
genre: concerto
isrc code: DEU901502506
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T12:31:03+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x86b64394e3ad29050b68ff02cd957df6cd13066beeee7b9d354afd3ff70c48f5
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960403
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960403
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502506
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T13:04:34Z
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 0x86b64394e3ad29050b68ff02cd957df6cd13066beeee7b9d354afd3ff70c48f5. 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/DEU901502506 — a six-check JSON result.
  date published: 2026-07-31T13:04:34Z
audio: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 7. Meno mosso, a tempo moderato - Live
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 109.569
  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: 0.449
  additional property: Energy
    type: PropertyValue
    value: 0.003
  additional property: Speechiness
    type: PropertyValue
    value: 0.031
  additional property: Acousticness
    type: PropertyValue
    value: 0.988
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.892
  additional property: Liveness
    type: PropertyValue
    value: 0.085
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.468
  additional property: Loudness (dB)
    type: PropertyValue
    value: -34.678
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 8. Tempo I - Live
type: MusicRecording
duration: PT0M36S
duration ms: 36373
explicit: false
by artist: Sergei Rachmaninoff
by artist: Rachmaninoff International Orchestra
by artist: Mikhail Pletnev
by artist: Kent Nagano
in album: Rachmaninoff Live – The Piano Concertos & The Paganini Rhapsody
  type: MusicAlbum
  date published: 2024-04-26
popularity: 1
genre: classical
genre: classical-piano
genre: concerto
isrc code: DEU901502507
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T15:32:15+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2f45497bc80c60e09377f105f903e65efd8a3e457418ae05146f636492076c7b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960427
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960427
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502507
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T15:59:18Z
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 0x2f45497bc80c60e09377f105f903e65efd8a3e457418ae05146f636492076c7b. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEU901502507 — a six-check JSON result.
  date published: 2026-07-31T15:59:18Z
audio: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 8. Tempo I - Live
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 148.908
  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: 0.59
  additional property: Energy
    type: PropertyValue
    value: 0.25
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.927
  additional property: Liveness
    type: PropertyValue
    value: 0.155
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.734
  additional property: Loudness (dB)
    type: PropertyValue
    value: -23
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 11. Moderato - Live
type: MusicRecording
duration: PT1M23S
duration ms: 83386
explicit: false
by artist: Sergei Rachmaninoff
by artist: Rachmaninoff International Orchestra
by artist: Mikhail Pletnev
by artist: Kent Nagano
in album: Rachmaninoff Live – The Piano Concertos & The Paganini Rhapsody
  type: MusicAlbum
  date published: 2024-04-26
popularity: 1
genre: classical
genre: classical-piano
genre: concerto
isrc code: DEU901502510
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T13:19:47+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4eb7884a69dd6c12ffa6c980953bbdb5f8bc21b091a998723197ecb00e6c87f8
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/DEU901502510
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 0x4eb7884a69dd6c12ffa6c980953bbdb5f8bc21b091a998723197ecb00e6c87f8. 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/DEU901502510 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 11. Moderato - Live
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 141.88
  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: 0.237
  additional property: Energy
    type: PropertyValue
    value: 0.126
  additional property: Speechiness
    type: PropertyValue
    value: 0.041
  additional property: Acousticness
    type: PropertyValue
    value: 0.965
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.924
  additional property: Liveness
    type: PropertyValue
    value: 0.177
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.103
  additional property: Loudness (dB)
    type: PropertyValue
    value: -31.137
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 12. Tempo di minuetto - Live
type: MusicRecording
duration: PT1M12S
duration ms: 72213
explicit: false
by artist: Sergei Rachmaninoff
by artist: Rachmaninoff International Orchestra
by artist: Mikhail Pletnev
by artist: Kent Nagano
in album: Rachmaninoff Live – The Piano Concertos & The Paganini Rhapsody
  type: MusicAlbum
  date published: 2024-04-26
popularity: 2
genre: classical
genre: classical-piano
genre: concerto
isrc code: DEU901502511
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T14:01:26+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7e5849939351f5726e426c72f1fdb02e787f9735e848116666acf17d81937ec0
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/DEU901502511
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 0x7e5849939351f5726e426c72f1fdb02e787f9735e848116666acf17d81937ec0. 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/DEU901502511 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 12. Tempo di minuetto - Live
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 105.996
  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: 0.265
  additional property: Energy
    type: PropertyValue
    value: 0.02
  additional property: Speechiness
    type: PropertyValue
    value: 0.037
  additional property: Acousticness
    type: PropertyValue
    value: 0.993
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.901
  additional property: Liveness
    type: PropertyValue
    value: 0.2
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.1
  additional property: Loudness (dB)
    type: PropertyValue
    value: -33.694
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 18. Andante cantabile - Live
type: MusicRecording
duration: PT3M17S
duration ms: 197026
explicit: false
by artist: Sergei Rachmaninoff
by artist: Rachmaninoff International Orchestra
by artist: Mikhail Pletnev
by artist: Kent Nagano
in album: Rachmaninoff Live – The Piano Concertos & The Paganini Rhapsody
  type: MusicAlbum
  date published: 2024-04-26
popularity: 2
genre: classical
genre: classical-piano
genre: concerto
isrc code: DEU901502517
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T12:37:05+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x50d75132d3a0ebd71979aca2e0c748276355ac7216bab9a4400bf204b8691191
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960403
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960403
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEU901502517
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T13:04:34Z
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 0x50d75132d3a0ebd71979aca2e0c748276355ac7216bab9a4400bf204b8691191. 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/DEU901502517 — a six-check JSON result.
  date published: 2026-07-31T13:04:34Z
audio: Rachmaninoff: Rhapsody on a Theme of Paganini, Op. 43: Var. 18. Andante cantabile - Live
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Rachmaninoff: Symphonic Dances & Pletnev: Rachmaniana
type: MusicAlbum
date published: 2026-05-22