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type: MusicGroup
genre: opera
popularity: 10
followers: 88
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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: 2026-06-20T10:56:20Z
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album: Sammartini: Maria Addolorata / Il Pianto Di San Pietro
  type: MusicAlbum
  date published: 2005-02-01
album: Sammartini: Memet [Opera]
  type: MusicAlbum
  date published: 2002-01-01
album: Pergolesi, Monteverdi, Frescobaldi: Stabat Mater - Sacred Baroque Music
  type: MusicAlbum
  date published: 1997
album: St John Passion
  type: MusicAlbum
  date published: 2009
album: Juvenalia et autres œuvres pour deux pianos et piano à quatre mains
  type: MusicAlbum
  date published: 2012-10-28
  track: Napoléon - Suite pour 2 piano: II. Brienne - From "Napoléon", Sasha Guitry
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    by artist: Antonella Moretti
    by artist: Mauro Ravelli
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      type: MusicAlbum
      date published: 2012-10-28
    popularity: 0
    genre: early-modern-classical
    genre: impressionism
    genre: neoclassicism
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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
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T08:56:20Z
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album: Peri: Euridice
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  date published: 1997-01-01
  track: Euridice, Scena II: Funeste piagge
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    by artist: Ensemble Albalonga
    by artist: Aníbal E. Cetrangolo
    by artist: Luca Dordolo
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    additional property: OTSVerifyInstructions
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T08:56:20Z
    audio: Euridice, Scena II: Funeste piagge
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  track: Euridice, Prologo: Sinfonia a 6
  track: Euridice, Scena I: Ninfe che i bei crin d'oro
  track: Euridice, Scena I: Per quel vago boschetto
  track: Euridice, Scena I: Sinfonia a 4 - S'Appennin nevoso il tergo - Sinfonia a 4
  track: Euridice, Scena I: Antri ch'ai miei lamenti
  track: Euridice, Scena I: Nel pur ardor de la più bella stella
  track: Euridice, Scena I: Lassa che di spavento
album: Caldara: Gloria in C Major - Respighi: Lauda per la natività del Signore, P. 166
album: L'Orfeo (opera di Claudio Monteverdi e libretto di Alessandro Striggio)
album: D. Scarlatti, S. Scarlatti & Howells: Choral Works
album: Castelnuovo-Tedesco: Shakespeare Sonnets, Op. 125 & Duets, Op. 97
album: Cavalli: Il novello Giasone (Live)
album: Mozart: Requiem - Ave Verum Corpus
album: Il barbiere di Siviglia, R 1.64
album: Marcello: Arianna
album: Mozart: Requiem K. 626 In D Minor (Version by Franz Xaver Süssmayr On Original Instruments)
album: Monteverdi, C.: Orfeo (L') [Opera]
album: Travestimenti
album: Joseph Haydn: Stabat Mater & Libera me, Domine

Euridice, Scena I: Ninfe che i bei crin d'oro
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duration: PT3M16S
duration ms: 196493
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by artist: Jacopo Peri
by artist: Ensemble Albalonga
by artist: Aníbal E. Cetrangolo
by artist: La Compagnia dei Febi Armonici
by artist: Alessandro Carmignani
by artist: Marisa Pugina
by artist: Mirko Guadagnini
in album: Peri: Euridice
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  date published: 1997-01-01
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T08:56:20Z
audio: Euridice, Scena I: Ninfe che i bei crin d'oro
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Euridice, Scena I: Per quel vago boschetto
type: MusicRecording
duration: PT9M46S
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by artist: Jacopo Peri
by artist: Ensemble Albalonga
by artist: Aníbal E. Cetrangolo
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additional property: OTSVerifyInstructions
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additional property: ProofProfileEvidenceStatus
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  date published: 2026-07-07T08:31:11Z
audio: Euridice, Scena I: Per quel vago boschetto
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Euridice, Scena I: Antri ch'ai miei lamenti
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by artist: Ensemble Albalonga
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by artist: Luca Dordolo
by artist: Mirko Guadagnini
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T13:50:38Z
audio: Euridice, Scena I: Antri ch'ai miei lamenti
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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

Euridice, Scena I: Nel pur ardor de la più bella stella
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by artist: Mirko Guadagnini
by artist: Matteo Zenatti
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subject of: OpenTimestamps Proof of Existence
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Euridice, Scena I: Lassa che di spavento
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Euridice, Prologo: Sinfonia a 6
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Euridice, Scena I: Sinfonia a 4 - S'Appennin nevoso il tergo - Sinfonia a 4
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Caldara: Gloria in C Major - Respighi: Lauda per la natività del Signore, P. 166
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L'Orfeo (opera di Claudio Monteverdi e libretto di Alessandro Striggio)
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D. Scarlatti, S. Scarlatti & Howells: Choral Works
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Cavalli: Il novello Giasone (Live)
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Mozart: Requiem - Ave Verum Corpus
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Il barbiere di Siviglia, R 1.64
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Marcello: Arianna
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Mozart: Requiem K. 626 In D Minor (Version by Franz Xaver Süssmayr On Original Instruments)
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Monteverdi, C.: Orfeo (L') [Opera]
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Travestimenti
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Joseph Haydn: Stabat Mater & Libera me, Domine
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