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subject of: OpenTimestamps Proof of Existence
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track: Septet in E-Flat Major, Op. 20: III. Tempo di menuetto
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  by artist: Leonidas Kavakos
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  by artist: Christopher Corbett
  by artist: Marco Postinghel
  by artist: Heinrich Braun
  in album: "Ode to Joy" - Beethoven for Winter
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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
  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-07T16:07:00Z
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track: Septet in E-Flat Major, Op. 20: III. Tempo di menuetto
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    date published: 2026-07-02T05:09:12Z
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track: Septet in E-Flat Major, Op. 20: IV. Tema con variazioni. Andante
track: Septet in E-Flat Major, Op. 20: VI. Andante con moto alla marcia - Presto
track: Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
track: Septet in E-Flat Major, Op. 20: II. Adagio cantabile
track: Septet in E-Flat Major, Op. 20: V. Scherzo - Allegro molto e vivace

Septet in E-Flat Major, Op. 20: IV. Tema con variazioni. Andante
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duration ms: 450586
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by artist: Ludwig van Beethoven
by artist: Leonidas Kavakos
by artist: Wen Xiao Zheng
by artist: Eric Terwilliger
by artist: Hanno Simons
by artist: Christopher Corbett
by artist: Marco Postinghel
by artist: Heinrich Braun
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  date published: 2019-10-18
genre: classical
genre: classical-piano
genre: chamber-music
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  date published: 2026-07-08T03:22:41Z
audio: Septet in E-Flat Major, Op. 20: IV. Tema con variazioni. Andante
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Septet in E-Flat Major, Op. 20: VI. Andante con moto alla marcia - Presto
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by artist: Ludwig van Beethoven
by artist: Leonidas Kavakos
by artist: Wen Xiao Zheng
by artist: Eric Terwilliger
by artist: Hanno Simons
by artist: Christopher Corbett
by artist: Marco Postinghel
by artist: Heinrich Braun
in album: Beethoven: Violin Concerto, Op. 61, Septet, Op. 20 & Variations on Folk Songs, Op. 105 & 107
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genre: classical
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additional property: OTSVerifyInstructions
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  date published: 2026-07-08T03:39:04Z
audio: Septet in E-Flat Major, Op. 20: VI. Andante con moto alla marcia - Presto
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Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
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duration: PT9M50S
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by artist: Leonidas Kavakos
by artist: Wen Xiao Zheng
by artist: Eric Terwilliger
by artist: Hanno Simons
by artist: Christopher Corbett
by artist: Marco Postinghel
by artist: Heinrich Braun
in album: Beethoven: Violin Concerto, Op. 61, Septet, Op. 20 & Variations on Folk Songs, Op. 105 & 107
  type: MusicAlbum
  date published: 2019-10-18
genre: classical
genre: classical-piano
genre: chamber-music
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T15:42:38Z
audio: Septet in E-Flat Major, Op. 20: I. Adagio - Allegro con brio
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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

Septet in E-Flat Major, Op. 20: II. Adagio cantabile
type: MusicRecording
duration: PT8M55S
duration ms: 535893
explicit: false
by artist: Ludwig van Beethoven
by artist: Leonidas Kavakos
by artist: Wen Xiao Zheng
by artist: Eric Terwilliger
by artist: Hanno Simons
by artist: Christopher Corbett
by artist: Marco Postinghel
by artist: Heinrich Braun
in album: Beethoven: Violin Concerto, Op. 61, Septet, Op. 20 & Variations on Folk Songs, Op. 105 & 107
  type: MusicAlbum
  date published: 2019-10-18
genre: classical
genre: classical-piano
genre: chamber-music
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T00:26:26Z
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Septet in E-Flat Major, Op. 20: V. Scherzo - Allegro molto e vivace
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by artist: Ludwig van Beethoven
by artist: Leonidas Kavakos
by artist: Wen Xiao Zheng
by artist: Eric Terwilliger
by artist: Hanno Simons
by artist: Christopher Corbett
by artist: Marco Postinghel
by artist: Heinrich Braun
in album: Beethoven: Violin Concerto, Op. 61, Septet, Op. 20 & Variations on Folk Songs, Op. 105 & 107
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  date published: 2026-07-31T20:42:35Z
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