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genre: chamber music
genre: orchestra
description: William Preucil (born January 30, 1958) is an American violinist. During a musical career spanning several decades, he served as concertmaster for four major American orchestras, most notably the Clev
popularity: 9
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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: Orchestral Excerpts for Violin
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track: Histoire du soldat, Suite, K29: I. Marche du soldat
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  by artist: Igor Stravinsky
  by artist: William Preucil
  by artist: Members Of The Cleveland Orchestra
  by artist: Pierre Boulez
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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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track: Histoire du soldat, Suite, K29: III. Musique de la 2ème scène. Pastorale
track: Histoire du soldat, Suite, K29: IV. Marche royale
track: Histoire du soldat, Suite, K29: V. Petit concert

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by artist: Pierre Boulez
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T06:58:00Z
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:19:15Z
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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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