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subject of: OpenTimestamps Proof of Existence
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track: 14 Songs, Op. 34: No. 14. Vocalise (arr. M. Press)
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  by artist: Michael Press
  by artist: Elissa Lee Koljonen
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    date published: 1999-01-01
  genre: classical
  genre: classical-piano
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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: 2026-07-02T03:55:08Z
  audio: 14 Songs, Op. 34: No. 14. Vocalise (arr. M. Press)
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track: 6 Morceaux, Op. 51: No. 6. Valse sentimentale (arr. M. Press)
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  by artist: Elissa Lee Koljonen
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  in album: Violin Recital: Koljonen, Elissa Lee - Chopin, F. / Elgar, E. / Rachmaninov, S. / Kreisler, F. / Liszt, F. (Heartbreak - Romantic Encores for Violin)
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    date published: 1999-01-01
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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: 2026-07-22T07:57:26Z
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track: Rachmaninov / Arr. Press & Gingold for Violin and Piano: 14 Romances, Op. 34: No. 14, Vocalise

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Rachmaninov / Arr. Press & Gingold for Violin and Piano: 14 Romances, Op. 34: No. 14, Vocalise
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by artist: Sergei Rachmaninoff
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in album: Violin Encores: Perlman
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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