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type: MusicGroup
genre: opera
popularity: 5
followers: 37
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additional property: OTSVerifyInstructions
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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: 2026-06-20T22:44:50Z
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album: Floriane Hasler - Queen Elisabeth Competition: Voice 2023 (Live)
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  date published: 2023-06-23
track: Médée, H. 491, Prologue: Air et trio. "Le ciel dans vos vœux s'intéresse"
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  by artist: Le Concert Spirituel
  by artist: Herve Niquet
  by artist: Hélène Carpentier
  by artist: Marine Lafdal-Franc
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    date published: 2024-01-05
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  genre: early-music
  genre: baroque
  genre: french-baroque
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  additional property: OTSTimestamp
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  additional property: OTSVerifyInstructions
    type: PropertyValue
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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: Vespro della Beata Vergine, SV 206: Faux-bourdon Lauda Jerusalem
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  by artist: La Tempête
  by artist: Simon-Pierre Bestion
  by artist: Floriane Hasler
  by artist: Alice Kamenezky
  by artist: Eugénie De Mey
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    type: MusicAlbum
    date published: 2019-10-11
  genre: classical
  genre: early-music
  genre: baroque
  genre: italian-baroque
  genre: italian-renaissance
  genre: madrigal
  genre: renaissance
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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: 2026-07-31T02:19:15Z
  audio: Vespro della Beata Vergine, SV 206: Faux-bourdon Lauda Jerusalem
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track: L'Egisto, Act I Scene 8: Col mio volto lusinghiero (Bellezza, Volupia)
track: Holst: Christmas Day
track: Iphigénie en Tauride, Prologue, Scene 2: Récit. Apollon occupé du soin de l'univers

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L'Egisto, Act I Scene 8: Col mio volto lusinghiero (Bellezza, Volupia)
type: MusicRecording
duration: PT2M52S
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explicit: false
by artist: Francesco Cavalli
by artist: Vincent Dumestre
by artist: Le Poème Harmonique
by artist: Marielou Jacquard
by artist: Floriane Hasler
in album: Cavalli: L'Egisto
  type: MusicAlbum
  date published: 2021
genre: choral
isrc code: FR9W12300236
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additional property: CopyrightStatus
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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: 2026-07-31T23:30:38Z
audio: L'Egisto, Act I Scene 8: Col mio volto lusinghiero (Bellezza, Volupia)
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Holst: Christmas Day
type: MusicRecording
duration: PT7M36S
duration ms: 456240
explicit: false
by artist: Gustav Holst
by artist: Maitrise Notre-Dame De Paris
by artist: Floriane Hasler
by artist: Jean-Christophe Lanièce
by artist: Yves Castagnet
by artist: Henri Chalet
in album: Notre-Dame - Cathédrale d'émotions
  type: MusicAlbum
  date published: 2020-04-10
genre: classical
genre: orchestra
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additional property: CopyrightStatus
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additional property: OTSVerificationAPI
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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 0x857fcc5d4e5721f047d8f6578fa931178c5a7e552802bae9552b003349c5dfbb. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1902645.
  date published: 2026-07-29T15:38:18Z
audio: Holst: Christmas Day
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Iphigénie en Tauride, Prologue, Scene 2: Récit. Apollon occupé du soin de l'univers
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by artist: Floriane Hasler
by artist: Le Concert Spirituel
by artist: Herve Niquet
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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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  date published: 2026-07-29T23:23:05Z
audio: Iphigénie en Tauride, Prologue, Scene 2: Récit. Apollon occupé du soin de l'univers
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