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genre: avant-garde
genre: chamber music
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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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album: Hindemith: Complete Music for Cello and Piano
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album: Hindemith: Complete Music for Piano Duo
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album: Hindemith: Complete Sonatas for Wind Instruments and Piano
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  track: Sonata for Bassoon and Piano: II. Langsam-Marsch-Beschulss, Pastorale. Ruhig
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    by artist: Luca Franceschelli
    by artist: Filippo Farinelli
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-08-01T00:40:43Z
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album: French Violin Sonatas
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album: Koechlin: Complete Music for Saxophone
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album: Peaceful Christmas - Pastorale
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album: Pastorale
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album: Beautiful Bassoon
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-30T14:36:16Z
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album: Dallapiccola: Complete Songs
album: Berg Complete Songs
album: Spontini: L'Opera vocale da camera completa
album: Rossini: Petite messe solennelle
album: Barber: Complete Songs
album: Falla, Albeniz, Montsalvatge, Mompou, Saint-Saëns: Joyas españolas (Spanish Echoes Of Canciones and Baladas For Mezzo-Soprano And Piano)
album: Sandro Fuga: Cello Sonatas
album: Canciones Antiguas
album: Songs from the Sacred Convent of Assisi
album: Debussy: Musique de scène pour les chansons de bilitis
album: Jolivet: Complete Chamber Music with Piano
album: Jolivet: Complete Songs
album: Duo Disecheis: Con / Di / Vergenze

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Clarinet Sonata in F Minor, Op. 120 No. 1: II. Andante un poco adagio
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
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Dallapiccola: Complete Songs
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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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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:20:19Z
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  audio: Sento nel core
track: Che fiero costume

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OTSVerificationAPI
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OTSTimestamp
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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

OpenTimestamps Proof of Existence
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date published: 2026-07-29T19:35:34Z

Sento nel core
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Che fiero costume
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by artist: Elisabetta Pallucchi
by artist: Filippo Farinelli
in album: Dallapiccola: Complete Songs
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genre: baroque
genre: italian-baroque
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T21:00:46Z
audio: Che fiero costume
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Berg Complete Songs
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date published: 2019-12-01

Spontini: L'Opera vocale da camera completa
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date published: 2014-04-01

Rossini: Petite messe solennelle
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  by artist: The New Chamber Singers
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-30T18:23:33Z
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Barber: Complete Songs
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  by artist: Leilah Dione Ezra
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  subject of: OpenTimestamps Proof of Existence
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Falla, Albeniz, Montsalvatge, Mompou, Saint-Saëns: Joyas españolas (Spanish Echoes Of Canciones and Baladas For Mezzo-Soprano And Piano)
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Sandro Fuga: Cello Sonatas
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Canciones Antiguas
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Songs from the Sacred Convent of Assisi
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Debussy: Musique de scène pour les chansons de bilitis
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  genre: post-romantic-era
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-31T15:20:15Z
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Jolivet: Complete Chamber Music with Piano
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-30T15:42:38Z
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Jolivet: Complete Songs
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Duo Disecheis: Con / Di / Vergenze
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