Mathilde Nguyen
type: MusicGroup
genre: chamber music
popularity: 9
followers: 18
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additional property: CopyrightChainExplorerURL
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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 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: 2026-06-17T02:39:28Z
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track: Concerto pour piano n°23 en La Majeur, K. 488 - 2e mouvement
  type: MusicRecording
  duration: PT6M34S
  duration ms: 394453
  explicit: false
  by artist: Michel Petrossian
  by artist: Orchestre De Picardie
  by artist: Mathilde Nguyen
  by artist: Léo Margue
  in album: En fanfare (The Marching Band) (Bande Originale du Film)
    type: MusicAlbum
    date published: 2024-11-08
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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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01147c7608f66003168a14a548d4e3748d97c4fcb93ff843bb237e7bb0ae4d04. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBMEZ2455960.
    date published: 2026-06-13T13:32:09Z
  audio: Concerto pour piano n°23 en La Majeur, K. 488 - 2e mouvement
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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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