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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: American Classics: Stephen Foster/ Charles Tomlinson Griffes / Aaron Copland
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album: Sure on This Shining Night: The Romantic Song in America
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album: All My Heart: Deborah Voigt Sings American Songs
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album: American Album for Flute
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-06T06:56:49Z
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album: Griffes: Pleasure Dome of Kubla Khan / The White Peacock
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album: Serene Journeys Through Classical Music
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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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album: The Gerard Schwarz Collection
album: Impressionistic Piano Music
album: AMEB Piano Series 18 Grade 8
album: From Rags to Riches: 100 Years of American Song (Live)
album: Griffes: The Vale of Dreams, Piano Music
album: Charles Tomlinson Griffes: Piano Music
album: The Pleasure-Dome of Kubla Khan
album: Griffes: Piano Works, Vol. 2
album: Griffes: 3 Tone Pictures / De Profundis / Sonata
album: Charles Griffes's Piano Music
album: A Russian Christmas
album: Charles Tomlinson Griffes: Collected Works for Piano
album: Griffes Piano Sonata
album: Griffes: The White Peacock (Recorded 1946)
album: America 1
album: Con fuoco: Romantic Works
album: My Name Is Barbara
album: Calm Classical Piano
album: The Very Best Of Thomas Hampson
album: Anthology of American Piano Music, Vol. 2 - American Nocturnes
album: Klassische Flötenmusik
album: Songs by 20th Century American Composers
album: The Complete Solo & Concerto Studio Recordings (Recorded 1928-1957)
album: The Sylvan Winds Perform Music of the Gilded Age
album: Where the Music Comes From
album: Howard Hanson conducts American Masterworks
album: Blue Ridge Parkway [Drive Time]
album: The Dark Side of the Flute
album: Cafe Au Lait
album: Taylor: Through the Looking Glass - Griffes: Poem - The Pleasure Dome of Kubla Khan
album: Impressionism Music
album: Piano by the Sea
album: Forest Murmurs

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The Gerard Schwarz Collection
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Impressionistic Piano Music
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AMEB Piano Series 18 Grade 8
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-02T03:30:09Z
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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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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T12:53:06Z
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Griffes: The Vale of Dreams, Piano Music
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The Pleasure-Dome of Kubla Khan
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Griffes: 3 Tone Pictures / De Profundis / Sonata
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Charles Griffes's Piano Music
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A Russian Christmas
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Charles Tomlinson Griffes: Collected Works for Piano
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Griffes Piano Sonata
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Griffes: The White Peacock (Recorded 1946)
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America 1
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Con fuoco: Romantic Works
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My Name Is Barbara
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Calm Classical Piano
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The Very Best Of Thomas Hampson
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Anthology of American Piano Music, Vol. 2 - American Nocturnes
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Klassische Flötenmusik
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Songs by 20th Century American Composers
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The Sylvan Winds Perform Music of the Gilded Age
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The Dark Side of the Flute
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Cafe Au Lait
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Taylor: Through the Looking Glass - Griffes: Poem - The Pleasure Dome of Kubla Khan
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Impressionism Music
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Forest Murmurs
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