Jules Matton
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  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 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. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4535966434ad10bb46fd019040b8a54e59c5e216e37e54151d934be910ac61. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/82c25481-36d6-4e3d-93b1-9cebbfc205fd.json and https://artists.proofprofile.net/proofs/artist/82c25481-36d6-4e3d-93b1-9cebbfc205fd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
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album: Jules Matton: Livre 1
  type: MusicAlbum
  date published: 2018-05-04
album: Jules Matton: Concerto baroque pour clavecin et orchestre I. Allegro
  type: MusicAlbum
  date published: 2022-11-18
album: Jules Matton, Livre 2: Œuvres Orchestrales
  type: MusicAlbum
  date published: 2022-12-02
track: Détail pour violoncelle baroque et clavecin

Détail pour violoncelle baroque et clavecin
type: MusicRecording
duration: PT3M40S
duration ms: 220120
explicit: false
by artist: Jules Matton
by artist: Anastasia Kobekina
by artist: Emmanuel Arakélian
in album: Ellipses
  type: MusicAlbum
  date published: 2022-06-10
popularity: 3
isrc code: FRU622260410
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Détail pour violoncelle baroque et clavecin
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  additional property: Key Name
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