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genre: avant-garde
genre: chamber music
genre: classical piano
genre: minimalism
genre: neoclassical
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album: Danish Piano Music
  type: MusicAlbum
  date published: 2002-01-01
album: Trio for Piano, Violin and Violoncello
  type: MusicAlbum
  date published: 2002-01-01
album: Encores
  type: MusicAlbum
  date published: 2004-01-01
album: Encores
  type: MusicAlbum
  date published: 2010-03-01
album: John Damgaard plays Haydn
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  date published: 2013-04-01
album: John Damgaard - Beethoven's Last Piano Sonatas Op. 109 / 110 / 111
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  date published: 2013-05-13
album: Encores II
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  date published: 2019-02-01
album: John Damgaard Plays Beethoven, Chopin and Brahms
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  date published: 2022-01-17
album: Beethoven, Chopin & Brahms: Works for Piano
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  date published: 2022-04-01
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    date published: 2026-07-08T03:20:19Z
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    date published: 2026-07-31T00:26:26Z
  audio: Piano Sonata No. 6 in A Minor, Op. 164, D. 537: II. Allegretto quasi andantino
track: Piano Sonata No. 6 in A Minor, Op. 164, D. 537: III. Allegro vivace
track: Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: I. Allegro moderato
track: Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: II. Andante molto
track: Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: III. Menuetto. Allegretto - Trio
track: Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: IV. Allegro moderato
track: Piano Sonata No. 9 in A Minor, Op. 42, D. 845: I. Moderato
track: Piano Sonata No. 9 in A Minor, Op. 42, D. 845: II. Andante poco mosso
track: Piano Sonata No. 9 in A Minor, Op. 42, D. 845: III. Scherzo. Allegro vivace - Trio. Un poco più lento
track: Piano Sonata No. 9 in A Minor, Op. 42, D. 845: IV. Rondo. Allegro vivace
track: Piano Sonata No. 5 in B Major, Op. 147, D. 575: I. Allegro ma non troppo
track: Piano Sonata No. 5 in B Major, Op. 147, D. 575: II. Andante
track: Piano Sonata No. 5 in B Major, Op. 147, D. 575: III. Scherzo. Allegretto - Trio

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Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: I. Allegro moderato
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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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genre: classical-piano
genre: chamber-music
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T13:50:38Z
audio: Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: III. Menuetto. Allegretto - Trio
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Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: IV. Allegro moderato
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duration ms: 472093
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by artist: John Damgaard
in album: Schubert: Piano Works
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  date published: 2025-04-01
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DKECA2557507
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-08-01T03:13:03Z
audio: Piano Sonata No. 7 in E-Flat Major, Op. 122, D. 568: IV. Allegro moderato
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Piano Sonata No. 9 in A Minor, Op. 42, D. 845: I. Moderato
type: MusicRecording
duration: PT8M38S
duration ms: 518680
explicit: false
by artist: Franz Schubert
by artist: John Damgaard
in album: Schubert: Piano Works
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  date published: 2025-04-01
genre: classical
genre: classical-piano
genre: chamber-music
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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: 2026-07-31T15:20:15Z
audio: Piano Sonata No. 9 in A Minor, Op. 42, D. 845: I. Moderato
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Piano Sonata No. 9 in A Minor, Op. 42, D. 845: II. Andante poco mosso
type: MusicRecording
duration: PT10M55S
duration ms: 655200
explicit: false
by artist: Franz Schubert
by artist: John Damgaard
in album: Schubert: Piano Works
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genre: classical
genre: classical-piano
genre: chamber-music
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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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: 2026-07-08T03:22:41Z
audio: Piano Sonata No. 9 in A Minor, Op. 42, D. 845: II. Andante poco mosso
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Piano Sonata No. 9 in A Minor, Op. 42, D. 845: III. Scherzo. Allegro vivace - Trio. Un poco più lento
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duration: PT7M37S
duration ms: 457106
explicit: false
by artist: Franz Schubert
by artist: John Damgaard
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genre: classical
genre: classical-piano
genre: chamber-music
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
  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: 2026-08-01T03:50:58Z
audio: Piano Sonata No. 9 in A Minor, Op. 42, D. 845: III. Scherzo. Allegro vivace - Trio. Un poco più lento
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Piano Sonata No. 9 in A Minor, Op. 42, D. 845: IV. Rondo. Allegro vivace
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explicit: false
by artist: Franz Schubert
by artist: John Damgaard
in album: Schubert: Piano Works
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genre: classical
genre: classical-piano
genre: chamber-music
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  type: PropertyValue
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-08-01T02:22:04Z
audio: Piano Sonata No. 9 in A Minor, Op. 42, D. 845: IV. Rondo. Allegro vivace
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Piano Sonata No. 5 in B Major, Op. 147, D. 575: I. Allegro ma non troppo
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duration ms: 345426
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by artist: John Damgaard
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genre: classical
genre: classical-piano
genre: chamber-music
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877cc51eb0eae20a6eb3c9773cab52a5475678120e47feffe31802d760fb0e62. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DKECA2557601.
  date published: 2026-07-08T03:22:41Z
audio: Piano Sonata No. 5 in B Major, Op. 147, D. 575: I. Allegro ma non troppo
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