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genre: japanese classical
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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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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T12:47:07Z
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track: Les noces de Jeanette: Air du rossignol (Arr. Pierre for Flute & Orchestra)
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T13:32:09Z
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track: Concerto for Flute & Harp in C Major, K. 299: II. Andantino
track: Concerto pour flûte et harpe
track: Concerto for Flute & Harp in C Major, K. 299: Concerto for Flute and Harp in C Major, K. 299: II. Andantino
track: Concerto for Flute & Harp in C Major, K. 299: Concerto for Flute and Harp in C Major, K. 299: III. Rondo: Allegro

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Concerto for Flute & Harp in C Major, K. 299: II. Andantino
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by artist: Roderick Shaw
by artist: Swedish Chamber Orchestra
by artist: Katarina Andreasson
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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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Concerto for Flute & Harp in C Major, K. 299: II. Andantino
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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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Concerto pour flûte et harpe
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by artist: Fabrice Pierre
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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
audio: Concerto pour flûte et harpe
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Concerto for Flute & Harp in C Major, K. 299: Concerto for Flute and Harp in C Major, K. 299: II. Andantino
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  date published: 2026-06-13T12:47:07Z
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Concerto for Flute & Harp in C Major, K. 299: Concerto for Flute and Harp in C Major, K. 299: III. Rondo: Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:47:07Z
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Les noces de Jeanette: Air du rossignol (Arr. Pierre for Flute & Orchestra)
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:47:07Z
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