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type: MusicGroup
genre: classical
genre: opera
popularity: 45
followers: 524
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T21:20:00Z
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album: Johann Strauss: Selected Works, Vol.8
  type: MusicAlbum
  date published: 2013-06-12
track: Le nozze di Figaro, K. 492: Sinfonia
track: Le nozze di Figaro, K. 492: Act I No. 1: Duettino - Cinque...dieci...venti...trenta
track: Le nozze di Figaro, K. 492: Act I No. 6: Aria - Non so piu cosa son faccio
track: Le nozze di Figaro, K. 492, Act III: Duettino: Canzonetta sull aria… Che soave zeffiretto

Le nozze di Figaro, K. 492: Sinfonia
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by artist: Wolfgang Amadeus Mozart
by artist: Marina Mescheriakova
by artist: Judith Halász
by artist: Michelle Breedt
by artist: Orsolya Safar
by artist: Gabriele Sima
by artist: Alexander Klinger
by artist: Michael Roider
by artist: Bo Skovhus
by artist: Peter Koves
by artist: Janusz Monarcha
by artist: Renato Girolami
by artist: Nicolaus Esterhazy Sinfonia
by artist: Michael Halasz
in album: Mozart: Nozze Di Figaro (Le) (The Marriage of Figaro)
  type: MusicAlbum
  date published: 2004-05-08
genre: classical
genre: classical-era
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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
additional property: ProofProfileEvidenceStatus
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Le nozze di Figaro, K. 492: Sinfonia
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Le nozze di Figaro, K. 492: Act I No. 1: Duettino - Cinque...dieci...venti...trenta
type: MusicRecording
duration: PT2M45S
duration ms: 165000
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Marina Mescheriakova
by artist: Judith Halász
by artist: Michelle Breedt
by artist: Orsolya Safar
by artist: Gabriele Sima
by artist: Alexander Klinger
by artist: Michael Roider
by artist: Bo Skovhus
by artist: Peter Koves
by artist: Janusz Monarcha
by artist: Renato Girolami
by artist: Nicolaus Esterhazy Sinfonia
by artist: Michael Halasz
in album: Mozart: Nozze Di Figaro (Le) (The Marriage of Figaro)
  type: MusicAlbum
  date published: 2004-05-08
genre: classical
genre: classical-era
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additional property: OTSVerifyInstructions
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additional property: ProofProfileEvidenceStatus
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Le nozze di Figaro, K. 492: Act I No. 1: Duettino - Cinque...dieci...venti...trenta
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Le nozze di Figaro, K. 492: Act I No. 6: Aria - Non so piu cosa son faccio
type: MusicRecording
duration: PT2M28S
duration ms: 148000
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Marina Mescheriakova
by artist: Judith Halász
by artist: Michelle Breedt
by artist: Orsolya Safar
by artist: Gabriele Sima
by artist: Alexander Klinger
by artist: Michael Roider
by artist: Bo Skovhus
by artist: Peter Koves
by artist: Janusz Monarcha
by artist: Renato Girolami
by artist: Nicolaus Esterhazy Sinfonia
by artist: Michael Halasz
in album: Mozart: Nozze Di Figaro (Le) (The Marriage of Figaro)
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  date published: 2004-05-08
genre: classical
genre: classical-era
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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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  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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f3b52b857f00e2c270b381b7ba2ecd87b744cc89a917205d6b2a73aea3803e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI190348112.
  date published: 2026-07-08T03:53:27Z
audio: Le nozze di Figaro, K. 492: Act I No. 6: Aria - Non so piu cosa son faccio
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Le nozze di Figaro, K. 492, Act III: Duettino: Canzonetta sull aria… Che soave zeffiretto
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duration ms: 185453
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Marina Mescheriakova
by artist: Judith Halász
by artist: Nicolaus Esterhazy Sinfonia
by artist: Michael Halasz
in album: The Ultimate Mozart Opera Album
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  date published: 2010-12-14
popularity: 2
genre: classical
genre: classical-era
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T13:04:34Z
audio: Le nozze di Figaro, K. 492, Act III: Duettino: Canzonetta sull aria… Che soave zeffiretto
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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