Amsterdam Sinfonietta
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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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album: Oboe passion - Arias & concertos by J.S. Bach & sons
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    audio: Ich bin vergnügt mit meinem Glücke BWV 84: Ich bin vergnügt mit meinem Glücke
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  track: Concerto in A for Oboe d'amore, Strings and Continuo: (Allegro)
  track: Liebster Jesu, mein Verlangen BWV 32: Liebster Jesu, mein Verlangen
  track: Ich hatte viel Bekümmernis BWV 21: Seufzer, Tränen, Kummer, Not
  track: Wer nur den lieben Gott läßt walten BWV 93: Ich will auf den Herren schaun
  track: Wer mich liebet, der wird mein Wort halten BWV 74: Komm, komm, mein Herze steht dir offen
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Concerto in A for Oboe d'amore, Strings and Continuo: (Allegro)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T20:42:35Z
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Liebster Jesu, mein Verlangen BWV 32: Liebster Jesu, mein Verlangen
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
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Ich hatte viel Bekümmernis BWV 21: Seufzer, Tränen, Kummer, Not
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T12:06:10Z
audio: Ich hatte viel Bekümmernis BWV 21: Seufzer, Tränen, Kummer, Not
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Wer nur den lieben Gott läßt walten BWV 93: Ich will auf den Herren schaun
type: MusicRecording
duration: PT2M7S
duration ms: 127933
explicit: false
by artist: Johann Sebastian Bach
by artist: Pauline Oostenrijk
by artist: Nienke Oostenrijk
by artist: Siebe Henstra
by artist: Margriet Stok
by artist: Lucia Swarts
by artist: Rémy Baudet
by artist: Franc Polman
by artist: Wim Ten Have
by artist: Robert Franenberg
by artist: Jaap Ter Linden
by artist: Amsterdam Sinfonietta
in album: Oboe passion - Arias & concertos by J.S. Bach & sons
  type: MusicAlbum
  date published: 2011-09-27
popularity: 1
genre: classical
genre: classical-piano
genre: early-music
genre: baroque
genre: chamber-music
genre: concerto
isrc code: NLB151100739
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
  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/NLB151100739
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 0xdaffd739228c98659896d26232569de8537fecccd302a0c99d558e57aab37c86. 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/NLB151100739 — a six-check JSON result.
  date published: 2026-07-08T03:20:19Z
audio: Wer nur den lieben Gott läßt walten BWV 93: Ich will auf den Herren schaun
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Wer mich liebet, der wird mein Wort halten BWV 74: Komm, komm, mein Herze steht dir offen
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duration: PT2M37S
duration ms: 157333
explicit: false
by artist: Johann Sebastian Bach
by artist: Nienke Oostenrijk
by artist: Pauline Oostenrijk
by artist: Rémy Baudet
by artist: Franc Polman
by artist: Margriet Stok
by artist: Robert Franenberg
by artist: Siebe Henstra
by artist: Lucia Swarts
by artist: Wim Ten Have
by artist: Jaap Ter Linden
by artist: Amsterdam Sinfonietta
in album: Oboe passion - Arias & concertos by J.S. Bach & sons
  type: MusicAlbum
  date published: 2011-09-27
popularity: 1
genre: classical
genre: classical-piano
genre: early-music
genre: baroque
genre: chamber-music
genre: concerto
isrc code: NLB151100741
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
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additional property: OTSVerificationAPI
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a994e08a54081f1cdb74a3ca3783bbd6e937bce4f37873c92d3e63ef80df043. 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/NLB151100741 — a six-check JSON result.
  date published: 2026-07-31T12:24:41Z
audio: Wer mich liebet, der wird mein Wort halten BWV 74: Komm, komm, mein Herze steht dir offen
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Frank Martin and the Saxophone
type: MusicAlbum
date published: 2012-01-01
track: Ballade for alto saxophone, piano, timpani and strings (1938)
  type: MusicRecording
  duration: PT14M40S
  duration ms: 880306
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  by artist: Frank Martin
  by artist: Arno Bornkamp
  by artist: Thierry Fischer
  by artist: Amsterdam Sinfonietta
  in album: Frank Martin and the Saxophone
    type: MusicAlbum
    date published: 2012-01-01
  popularity: 1
  isrc code: NLC242100409
  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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    value: 960468
  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLC242100409
  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 0x0338ecaa5efc934efb52bce7b822b9231abec993538e59601314d0cadd64391b. 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/NLC242100409 — a six-check JSON result.
    date published: 2026-07-31T21:25:57Z
  audio: Ballade for alto saxophone, piano, timpani and strings (1938)
    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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The Bohemian Album
type: MusicAlbum
date published: 2009-01-01
track: Serenade for Strings in E Major, Op. 22, B. 52: I. Moderato
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  duration: PT4M28S
  duration ms: 268013
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  by artist: Antonín Dvořák
  by artist: Candida Thompson
  by artist: Amsterdam Sinfonietta
  in album: The Bohemian Album
    type: MusicAlbum
    date published: 2009-01-01
  genre: classical
  genre: late-romantic-era
  genre: czech-classical
  isrc code: NLA460911042
  additional property: CopyrightID
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    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
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460911042
  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 0xea82bf4f5437ed88f11bc5b99d7855c93e469a31015ca9f2b3f1b0296ba7a120. 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/NLA460911042 — a six-check JSON result.
    date published: 2026-07-31T00:26:26Z
  audio: Serenade for Strings in E Major, Op. 22, B. 52: I. Moderato
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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: Speechiness
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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track: Serenade for Strings in E Major, Op. 22, B. 52: II. Tempo di Valse - Trio
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  duration: PT6M20S
  duration ms: 380240
  explicit: false
  by artist: Antonín Dvořák
  by artist: Candida Thompson
  by artist: Amsterdam Sinfonietta
  in album: The Bohemian Album
    type: MusicAlbum
    date published: 2009-01-01
  genre: classical
  genre: late-romantic-era
  genre: czech-classical
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  additional property: CopyrightID
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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 0xe42141ce2cc2c3889f587b431dc6a464e53b81422f6d684691dcf588ea17949d. 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/NLA460911043 — a six-check JSON result.
    date published: 2026-07-08T03:20:19Z
  audio: Serenade for Strings in E Major, Op. 22, B. 52: II. Tempo di Valse - Trio
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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
      type: PropertyValue
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    additional property: Energy
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    additional property: Speechiness
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    additional property: Valence (Positivity)
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track: Serenade for Strings in E Major, Op. 22, B. 52: III. Scherzo. Vivace
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  duration: PT6M22S
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  explicit: false
  by artist: Antonín Dvořák
  by artist: Candida Thompson
  by artist: Amsterdam Sinfonietta
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    type: MusicAlbum
    date published: 2009-01-01
  genre: classical
  genre: late-romantic-era
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  additional property: CopyrightID
  additional property: CopyrightStatus
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  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Serenade for Strings in E Major, Op. 22, B. 52: III. Scherzo. Vivace
track: Serenade for Strings in E Major, Op. 22, B. 52: IV. Larghetto

CopyrightRegisteredAt
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CopyrightChainExplorerURL
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OTSHash
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OTSBitcoinBlock
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OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960489

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460911044

OTSTimestamp
type: PropertyValue
value: 2026-08-01T00:40:43Z

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 0xc976e4c2de1f6e84a8acd5a27e485c6f32ad137b4b9b038150acf1fcb88f3548. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLA460911044 — a six-check JSON result.
date published: 2026-08-01T00:40:43Z

Serenade for Strings in E Major, Op. 22, B. 52: III. Scherzo. Vivace
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additional property: Tempo (BPM)
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additional property: Musical Key
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Serenade for Strings in E Major, Op. 22, B. 52: IV. Larghetto
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
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Bach
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date published: 2019-09-27
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T12:47:07Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T12:53:06Z
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track: Concerto for 2 Harpsichords, Strings & Continuo in C Major, BWV 1061: 3. Fuga (performed on two pianos)
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  subject of: OpenTimestamps Proof of Existence
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track: Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 1. Allegro (performed on two pianos)
track: Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 2. Adagio (performed on two pianos)
track: Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 3. Allegro (performed on two pianos)
track: Aus tiefer Not schrei ich zu dir, BWV 687 (Arr. For Piano Four Hands by György Kurtág)
track: Orgelbüchlein: Nun komm’ der Heiden Heiland, BWV 599 (Arr. For Piano Four Hands by György Kurtág)
track: O Lamm Gottes unschuldig, BWV Deest (Arr. For Piano Four Hands by György Kurtág)
track: Gottes Zeit ist die allerbeste Zeit, BWV 106: 2a. Gottes Zeit, ist die allerbeste Zeit (Arr. For Piano Four Hands by György Kurtág)
track: "Was mir behagt, ist nur die muntre Jagd" Cantata, BWV 208: 9. Schafe können sicher weiden (Arr. For Piano Four Hands by Mary Howe)
track: Herz und Mund und Tat und Leben, Cantata BWV 147: 10. Jesus bleibet meine Freude (Arr. For Two Pianos by Myra Hess) - Live

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OTSVerificationAPI
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OTSVerifyInstructions
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OpenTimestamps Proof of Existence
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date published: 2026-06-13T13:32:09Z

Concerto for 2 Harpsichords, Strings & Continuo in C Major, BWV 1061: 3. Fuga (performed on two pianos)
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Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 1. Allegro (performed on two pianos)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T13:32:09Z
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Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 2. Adagio (performed on two pianos)
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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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Concerto for 2 Harpsichords, Strings & Continuo in C Minor, BWV 1060: 3. Allegro (performed on two pianos)
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  date published: 2026-06-13T12:53:06Z
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Aus tiefer Not schrei ich zu dir, BWV 687 (Arr. For Piano Four Hands by György Kurtág)
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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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Orgelbüchlein: Nun komm’ der Heiden Heiland, BWV 599 (Arr. For Piano Four Hands by György Kurtág)
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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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O Lamm Gottes unschuldig, BWV Deest (Arr. For Piano Four Hands by György Kurtág)
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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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Gottes Zeit ist die allerbeste Zeit, BWV 106: 2a. Gottes Zeit, ist die allerbeste Zeit (Arr. For Piano Four Hands by György Kurtág)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:53:06Z
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"Was mir behagt, ist nur die muntre Jagd" Cantata, BWV 208: 9. Schafe können sicher weiden (Arr. For Piano Four Hands by Mary Howe)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:47:07Z
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Herz und Mund und Tat und Leben, Cantata BWV 147: 10. Jesus bleibet meine Freude (Arr. For Two Pianos by Myra Hess) - Live
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genre: baroque
genre: chamber-music
genre: concerto
isrc code: NLK4J1900012
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-08T04:20:40+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xb70adec76e74f17b9e504750edc078b30fab3100c92008a4ca6b83e9203b53a1
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953520
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953520
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLK4J1900012
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T13:32:09Z
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 0xb70adec76e74f17b9e504750edc078b30fab3100c92008a4ca6b83e9203b53a1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLK4J1900012 — a six-check JSON result.
  date published: 2026-06-13T13:32:09Z
audio: Herz und Mund und Tat und Leben, Cantata BWV 147: 10. Jesus bleibet meine Freude (Arr. For Two Pianos by Myra Hess) - Live
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 116.779
  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: 0.393
  additional property: Energy
    type: PropertyValue
    value: 0.057
  additional property: Speechiness
    type: PropertyValue
    value: 0.043
  additional property: Acousticness
    type: PropertyValue
    value: 0.996
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.871
  additional property: Liveness
    type: PropertyValue
    value: 0.101
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.324
  additional property: Loudness (dB)
    type: PropertyValue
    value: -33.559
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Pärt über Bach
type: MusicAlbum
date published: 2024-04-26
track: Ich hatte viel Bekümmernis, BWV 21, Erster Teil: Sinfonia
  type: MusicRecording
  duration: PT3M29S
  duration ms: 209560
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Amsterdam Sinfonietta
  by artist: Simone Lamsma
  by artist: Candida Thompson
  in album: Pärt über Bach
    type: MusicAlbum
    date published: 2024-04-26
  popularity: 11
  genre: classical
  genre: classical-piano
  genre: early-music
  genre: baroque
  genre: chamber-music
  genre: concerto
  isrc code: NLA460915411
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-29T18:48:30+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x57fd25e47081af795830474bb7d434a4cc6f921075318a4cb2ad0c035463c670
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960138
  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/NLA460915411
  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 0x57fd25e47081af795830474bb7d434a4cc6f921075318a4cb2ad0c035463c670. 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/NLA460915411 — a six-check JSON result.
    date published: 2026-07-29T19:35:34Z
  audio: Ich hatte viel Bekümmernis, BWV 21, Erster Teil: Sinfonia
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 142.433
    additional property: Musical Key
      type: PropertyValue
      value: 0
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 6
    additional property: Danceability
      type: PropertyValue
      value: 0.154
    additional property: Energy
      type: PropertyValue
      value: 0.071
    additional property: Speechiness
      type: PropertyValue
      value: 0.04
    additional property: Acousticness
      type: PropertyValue
      value: 0.647
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.514
    additional property: Liveness
      type: PropertyValue
      value: 0.088
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.059
    additional property: Loudness (dB)
      type: PropertyValue
      value: -25.996
    additional property: Key Name
      type: PropertyValue
      value: C
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Tabula rasa: I. Ludum
  type: MusicRecording
  duration: PT9M55S
  duration ms: 595640
  explicit: false
  by artist: Arvo Pärt
  by artist: Amsterdam Sinfonietta
  by artist: Candida Thompson
  by artist: Simone Lamsma
  in album: Pärt über Bach
    type: MusicAlbum
    date published: 2024-04-26
  popularity: 11
  isrc code: NLA460915412
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-29T22:02:00+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x361b579c309a5464df2a761abdc353196e1833436d2aea3a3941be2743c4dd2e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960157
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960157
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460915412
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-29T22:12:10Z
  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 0x361b579c309a5464df2a761abdc353196e1833436d2aea3a3941be2743c4dd2e. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/NLA460915412 — a six-check JSON result.
    date published: 2026-07-29T22:12:10Z
  audio: Tabula rasa: I. Ludum
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 110.555
    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: 0.216
    additional property: Energy
      type: PropertyValue
      value: 0.188
    additional property: Speechiness
      type: PropertyValue
      value: 0.058
    additional property: Acousticness
      type: PropertyValue
      value: 0.564
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.047
    additional property: Liveness
      type: PropertyValue
      value: 0.078
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.034
    additional property: Loudness (dB)
      type: PropertyValue
      value: -26.237
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor
track: Tabula rasa: II. Silentium
  type: MusicRecording
  duration: PT17M30S
  duration ms: 1050600
  explicit: false
  by artist: Arvo Pärt
  by artist: Amsterdam Sinfonietta
  by artist: Candida Thompson
  by artist: Simone Lamsma
  in album: Pärt über Bach
    type: MusicAlbum
    date published: 2024-04-26
  popularity: 8
  isrc code: NLA460915413
  additional property: CopyrightID
  additional property: CopyrightStatus
  additional property: CopyrightRegisteredAt
  additional property: CopyrightChainExplorerURL
  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: Tabula rasa: II. Silentium
track: Collage über B-A-C-H: I. Toccata
track: Collage über B-A-C-H: II. Sarabande
track: Collage über B-A-C-H: III. Ricercare
track: Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): I. Allegro
track: Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): II. Adagio
track: Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): III. Allegro
track: Silouan's Song

CopyrightStatus
type: PropertyValue
value: registered

CopyrightRegisteredAt
type: PropertyValue
value: 2026-07-06T19:43:03+00:00

CopyrightChainExplorerURL
type: PropertyValue
value: https://explorer.copyrightchains.com/tx/0xefe5456181b7615a9a44bfe670134a05dbc284f969c2cb76ad6d39a535b4e4e0

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 957118

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/NLA460915413

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 0xefe5456181b7615a9a44bfe670134a05dbc284f969c2cb76ad6d39a535b4e4e0. 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/NLA460915413 — a six-check JSON result.
date published: 2026-07-08T03:20:19Z

Tabula rasa: II. Silentium
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 100.093
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: 0.068
additional property: Energy
  type: PropertyValue
  value: 0.016
additional property: Speechiness
  type: PropertyValue
  value: 0.051
additional property: Acousticness
  type: PropertyValue
  value: 0.41
additional property: Instrumentalness
  type: PropertyValue
  value: 0.017
additional property: Liveness
  type: PropertyValue
  value: 0.105
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.038
additional property: Loudness (dB)
  type: PropertyValue
  value: -38.114
additional property: Key Name
  type: PropertyValue
  value: F
additional property: Mode Name
  type: PropertyValue
  value: Major

Collage über B-A-C-H: I. Toccata
type: MusicRecording
duration: PT2M52S
duration ms: 172520
explicit: false
by artist: Arvo Pärt
by artist: Amsterdam Sinfonietta
by artist: Candida Thompson
in album: Pärt über Bach
  type: MusicAlbum
  date published: 2024-04-26
popularity: 8
isrc code: NLA460915414
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T06:45:55+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x4218e38733e742adb954a84276392b1d0c05a073da922d2cce33362de26a02b3
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960220
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960220
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460915414
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T07:28:30Z
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 0x4218e38733e742adb954a84276392b1d0c05a073da922d2cce33362de26a02b3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/NLA460915414 — a six-check JSON result.
  date published: 2026-07-30T07:28:30Z
audio: Collage über B-A-C-H: I. Toccata
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 134.534
  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: 0.5
  additional property: Energy
    type: PropertyValue
    value: 0.21
  additional property: Speechiness
    type: PropertyValue
    value: 0.06
  additional property: Acousticness
    type: PropertyValue
    value: 0.88
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.691
  additional property: Liveness
    type: PropertyValue
    value: 0.09
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.077
  additional property: Loudness (dB)
    type: PropertyValue
    value: -24.32
  additional property: Key Name
    type: PropertyValue
    value: Bb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Collage über B-A-C-H: II. Sarabande
type: MusicRecording
duration: PT2M54S
duration ms: 174520
explicit: false
by artist: Arvo Pärt
by artist: Amsterdam Sinfonietta
by artist: Candida Thompson
in album: Pärt über Bach
  type: MusicAlbum
  date published: 2024-04-26
popularity: 6
isrc code: NLA460915415
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-30T23:24:16+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x59d386a2ad9b16d91515159492551407df531ba66dfa7bee1d1b6bfab1966bf9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960327
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960327
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460915415
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T00:26:26Z
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 0x59d386a2ad9b16d91515159492551407df531ba66dfa7bee1d1b6bfab1966bf9. 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/NLA460915415 — a six-check JSON result.
  date published: 2026-07-31T00:26:26Z
audio: Collage über B-A-C-H: II. Sarabande
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 109.335
  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: 0.122
  additional property: Energy
    type: PropertyValue
    value: 0.116
  additional property: Speechiness
    type: PropertyValue
    value: 0.039
  additional property: Acousticness
    type: PropertyValue
    value: 0.955
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.508
  additional property: Liveness
    type: PropertyValue
    value: 0.231
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.038
  additional property: Loudness (dB)
    type: PropertyValue
    value: -25.646
  additional property: Key Name
    type: PropertyValue
    value: D
  additional property: Mode Name
    type: PropertyValue
    value: Minor

Collage über B-A-C-H: III. Ricercare
type: MusicRecording
duration: PT1M50S
duration ms: 110400
explicit: false
by artist: Arvo Pärt
by artist: Amsterdam Sinfonietta
by artist: Candida Thompson
in album: Pärt über Bach
  type: MusicAlbum
  date published: 2024-04-26
popularity: 5
isrc code: NLA460915416
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-31T06:30:03+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x78dd7af2a29da59b2cddc2cfa0a436665a7a677f13a97502f298174c9e4ff973
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960360
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960360
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLA460915416
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T06:42:11Z
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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Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): I. Allegro
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Concerto for Violin and Oboe in C Minor, BWV 1060R (Version for Two Violins): III. Allegro
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Silouan's Song
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Bach: Ich hatte viel Bekümmernis, BWV 21, Erster Teil: Sinfonia
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Verstreken Verzen
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Spiegel im Spiegel (Live)
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Formidable! French Chansons
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Lento Religioso
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Vivaldi
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Tchaikovsky: Serenade for Strings, Op. 48 - Arensky: Chamber Symphony
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Bartók: Divertimento - Brahms: String Quintet in G
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The Argentinian Album
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Shostakovich: Chamber Symphonies, Op. 110a & 118a - Weinberg: Concertino, Op. 42
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Brahms: String Quartet in C Minor - Schönberg: Verklärte Nacht
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The Mahler Album
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Shostakovich: String Quartets Nos. 2 & 4
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Beethoven: String Quartet, Op. 135 - Walton: Sonata for Strings
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Tchaikovsky: Souvenir de Florence / Verdi: String Quartet
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Sumera: Concerto per voci e strumenti: I. Furioso
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Pärt: Silouan's Song
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Vivaldi: Cello Concerto in F Major, RV412: 2. Larghetto
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Vivaldi: Concerto for 2 Cellos, Strings and Continuo in G Minor, RV 531: 3. Allegro
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Clarinet Concerto in A Major, K. 622: II. Adagio
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T13:32:09Z
audio: Clarinet Concerto in A Major, K. 622: II. Adagio
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