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genre: classical
genre: opera
description: thumb|The German conductor Ferdinand Leitner rehearsing with the Bamberg Symphony orchestra. Ferdinand Leitner (4 March 1912 in Berlin – 3 June 1996 in Zürich) was a German conductor. Leitner studied
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    by artist: Ludwig van Beethoven
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    by artist: Herbert von Karajan
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      date published: 1995-01-01
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  track: Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro
  track: Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": I. Adagio sostenuto
  track: Symphony No. 7 in A Major, Op. 92: I. Poco sostenuto - Vivace
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  track: Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": I. Allegro con brio
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  track: Piano Sonata No. 23 in F Minor, Op. 57 "Appassionata": I. Allegro assai
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  track: Piano Sonata No. 23 in F Minor, Op. 57 "Appassionata": III. Allegro ma non troppo
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album: Weber: Euryanthe, J. 291 (Live)
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album: Die Walküre - Abridged Act 1 and 2
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album: Mozart: Serenade No. 7, K. 250 "Haffner"
album: Ravel: Tzigane - Lalo: Symphonie espagnole - Franck: Violin Sonata in A Major
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album: Philippe Hirschhorn (1st Prize Queen Elisabeth International Competition 1967) [Live]
album: Handel: Tamerlano, HWV 18
album: Ferdinand Leitner Anniversary Edition
album: Lortzing: Der Wildschütz (Recorded 1958) [Live]
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album: Bach: Geschwinde, ihr wirbelnden Winde
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album: Milestones of a Violin Legend: Wolfgang Schneiderhan, Vol. 7
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album: Milestones of a Violin Legend: Wolfgang Schneiderhan, Vol. 6
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track: Lohengrin, WWV 75 / Act 2: "Euch Lüften, die mein Klagen"

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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": I. Grave – Allegro di molto e con brio
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  date published: 2026-07-22T13:34:27Z
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Symphony No. 5 in C Minor, Op. 67: I. Allegro con brio
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Symphony No. 5 in C Minor, Op. 67: II. Andante con moto
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duration: PT10M0S
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by artist: Ludwig van Beethoven
by artist: Wiener Philharmoniker
by artist: Carlos Kleiber
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 25
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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T13:32:09Z
audio: Symphony No. 5 in C Minor, Op. 67: II. Andante con moto
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Symphony No. 9 in D Minor, Op. 125 "Choral": I. Allegro ma non troppo, un poco maestoso
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duration: PT15M28S
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by artist: Ludwig van Beethoven
by artist: Berliner Philharmoniker
by artist: Herbert von Karajan
in album: Originals Beethoven Box
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  date published: 1995-01-01
popularity: 12
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: 2026-07-02T03:30:09Z
audio: Symphony No. 9 in D Minor, Op. 125 "Choral": I. Allegro ma non troppo, un poco maestoso
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Piano Concerto No. 4 in G Major, Op. 58: II. Andante con moto
type: MusicRecording
duration: PT4M49S
duration ms: 289000
explicit: false
by artist: Ludwig van Beethoven
by artist: Wilhelm Kempff
by artist: Berliner Philharmoniker
by artist: Ferdinand Leitner
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 7
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056101731
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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: 2026-07-22T14:03:35Z
audio: Piano Concerto No. 4 in G Major, Op. 58: II. Andante con moto
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio cantabile
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duration: PT4M55S
duration ms: 295000
explicit: false
by artist: Ludwig van Beethoven
by artist: Wilhelm Kempff
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 7
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056500141
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
additional property: CopyrightChainExplorerURL
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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
  type: DigitalDocument
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  date published: 2026-07-29T19:35:34Z
audio: Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": II. Adagio cantabile
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Symphony No. 5 in C Minor, Op. 67: III. Allegro
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duration: PT5M9S
duration ms: 309466
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by artist: Ludwig van Beethoven
by artist: Wiener Philharmoniker
by artist: Carlos Kleiber
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 34
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF057401774
additional property: CopyrightID
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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: 2026-06-13T12:47:07Z
audio: Symphony No. 5 in C Minor, Op. 67: III. Allegro
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Symphony No. 9 in D Minor, Op. 125 "Choral": II. Scherzo. Molto vivace – Presto
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duration: PT11M0S
duration ms: 660000
explicit: false
by artist: Ludwig van Beethoven
by artist: Berliner Philharmoniker
by artist: Herbert von Karajan
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 12
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056201682
additional property: CopyrightID
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edfe64dc4788c583ddc5d437d5058f10b27133fbbce02f35bd080ef2260f349. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEF056201682.
  date published: 2026-07-02T03:30:09Z
audio: Symphony No. 9 in D Minor, Op. 125 "Choral": II. Scherzo. Molto vivace – Presto
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Piano Concerto No. 4 in G Major, Op. 58: III. Rondo. Vivace
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duration: PT10M29S
duration ms: 629000
explicit: false
by artist: Ludwig van Beethoven
by artist: Wilhelm Kempff
by artist: Berliner Philharmoniker
by artist: Ferdinand Leitner
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 7
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056101733
additional property: CopyrightID
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additional property: CopyrightRegisteredAt
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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
  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: 2026-07-22T15:38:35Z
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Piano Sonata No. 8 in C Minor, Op. 13 "Pathétique": III. Rondo. Allegro
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by artist: Wilhelm Kempff
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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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Symphony No. 5 in C Minor, Op. 67: IV. Allegro
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by artist: Wiener Philharmoniker
by artist: Carlos Kleiber
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:53:06Z
audio: Symphony No. 5 in C Minor, Op. 67: IV. Allegro
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Symphony No. 9 in D Minor, Op. 125 "Choral": III. Adagio molto e cantabile
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by artist: Berliner Philharmoniker
by artist: Herbert von Karajan
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genre: classical
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Symphony No. 9 in D Minor, Op. 125 "Choral": III. Adagio molto e cantabile
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Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro
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duration ms: 1215000
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by artist: Berliner Philharmoniker
by artist: Ferdinand Leitner
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popularity: 8
genre: classical
genre: classical-piano
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T03:48:36Z
audio: Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": I. Adagio sostenuto
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duration: PT6M0S
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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: Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": I. Adagio sostenuto
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Symphony No. 7 in A Major, Op. 92: I. Poco sostenuto - Vivace
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T15:41:10Z
audio: Symphony No. 7 in A Major, Op. 92: I. Poco sostenuto - Vivace
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Symphony No. 9 in D Minor, Op. 125 "Choral": IVa-b. Presto – Allegro assai - Recorded 1962
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8392be11448cf54fabeb99cdf19869d99c09642fd1c0643ebc00b6497e8eef89. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEF056201687.
  date published: 2026-07-02T03:55:08Z
audio: Symphony No. 9 in D Minor, Op. 125 "Choral": IVa-b. Presto – Allegro assai - Recorded 1962
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": II. Adagio un poco moto –
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duration: PT7M34S
duration ms: 454906
explicit: false
by artist: Ludwig van Beethoven
by artist: Wilhelm Kempff
by artist: Berliner Philharmoniker
by artist: Ferdinand Leitner
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 7
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056101753
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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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: 2026-07-22T17:48:40Z
audio: Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": II. Adagio un poco moto –
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": II. Allegretto
type: MusicRecording
duration: PT2M19S
duration ms: 139400
explicit: false
by artist: Ludwig van Beethoven
by artist: Wilhelm Kempff
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 5
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056500172
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
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additional property: CopyrightChainExplorerURL
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additional property: OTSBitcoinBlock
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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
  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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be663000a2e3a22b6ff8c80afb816abaaf7a51028abcdc8d71639201c03b2f7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEF056500172.
  date published: 2026-07-07T18:39:05Z
audio: Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": II. Allegretto
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Symphony No. 7 in A Major, Op. 92: II. Allegretto
type: MusicRecording
duration: PT8M9S
duration ms: 489000
explicit: false
by artist: Ludwig van Beethoven
by artist: Wiener Philharmoniker
by artist: Carlos Kleiber
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 32
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF057601361
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-06-06T03:31:10+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953513
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057601361
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-13T12:47:07Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec8696a868897006f7eb78aacaa2d04edaad9677b12bda548f67fb46f0197748. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEF057601361.
  date published: 2026-06-13T12:47:07Z
audio: Symphony No. 7 in A Major, Op. 92: II. Allegretto
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  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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Symphony No. 9 in D Minor, Op. 125 "Choral": IVc-j. Presto. O Freunde nicht diese Töne – Prestissimo - Recorded 1962
type: MusicRecording
duration: PT17M31S
duration ms: 1051933
explicit: false
by artist: Ludwig van Beethoven
by artist: Gundula Janowitz
by artist: Hilde Rössel Majdan
by artist: Waldemar Kmentt
by artist: Walter Berry
by artist: Wiener Singverein
by artist: Berliner Philharmoniker
by artist: Herbert von Karajan
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 11
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056201688
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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  value: 2026-06-09T18:22:05+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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  value: 956302
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/956302
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056201688
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:30:09Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb6c122ecb1d64d4a41136261e99ed7889461d39d078a5694351f853aa8b189. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEF056201688.
  date published: 2026-07-02T03:30:09Z
audio: Symphony No. 9 in D Minor, Op. 125 "Choral": IVc-j. Presto. O Freunde nicht diese Töne – Prestissimo - Recorded 1962
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
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  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Liveness
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.115
  additional property: Loudness (dB)
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    value: -19.163
  additional property: Key Name
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  additional property: Mode Name
    type: PropertyValue
    value: Major

Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": III. Rondo. Allegro ma non troppo
type: MusicRecording
duration: PT10M36S
duration ms: 636093
explicit: false
by artist: Ludwig van Beethoven
by artist: Wilhelm Kempff
by artist: Berliner Philharmoniker
by artist: Ferdinand Leitner
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 7
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056101754
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-29T13:34:27+00:00
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0x0ec0c8ffb1de73699859f140e3d49a0cb3ffebdfb2693b6beaa1327962c4104a
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960117
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960117
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056101754
additional property: OTSTimestamp
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  value: 2026-07-29T14:28:24Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec0c8ffb1de73699859f140e3d49a0cb3ffebdfb2693b6beaa1327962c4104a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEF056101754.
  date published: 2026-07-29T14:28:24Z
audio: Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": III. Rondo. Allegro ma non troppo
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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  additional property: Key Name
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    value: Eb
  additional property: Mode Name
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Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": III. Presto agitato
type: MusicRecording
duration: PT5M30S
duration ms: 330000
explicit: false
by artist: Ludwig van Beethoven
by artist: Wilhelm Kempff
in album: Originals Beethoven Box
  type: MusicAlbum
  date published: 1995-01-01
popularity: 7
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEF056500173
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-29T12:35:56+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe4baa70d9ac1ac43452659643a8e5b88818f0fb23ae7f4c8d365952b3462a16b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960108
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960108
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056500173
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T13:09:35Z
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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4baa70d9ac1ac43452659643a8e5b88818f0fb23ae7f4c8d365952b3462a16b. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/DEF056500173.
  date published: 2026-07-29T13:09:35Z
audio: Piano Sonata No. 14 in C-Sharp Minor, Op. 27 No. 2 "Moonlight Sonata": III. Presto agitato
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Symphony No. 7 in A Major, Op. 92: III. Presto - Assai meno presto
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by artist: Wiener Philharmoniker
by artist: Carlos Kleiber
in album: Originals Beethoven Box
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popularity: 27
genre: classical
genre: classical-piano
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T13:32:09Z
audio: Symphony No. 7 in A Major, Op. 92: III. Presto - Assai meno presto
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Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": I. Allegro con brio
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by artist: Wilhelm Kempff
in album: Originals Beethoven Box
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popularity: 6
genre: classical
genre: classical-piano
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T15:38:18Z
audio: Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": I. Allegro con brio
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Symphony No. 7 in A Major, Op. 92: IV. Allegro con brio
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duration: PT8M36S
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by artist: Wiener Philharmoniker
by artist: Carlos Kleiber
in album: Originals Beethoven Box
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popularity: 18
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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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T13:32:09Z
audio: Symphony No. 7 in A Major, Op. 92: IV. Allegro con brio
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Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": II. Introduzione. Adagio molto
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duration: PT3M5S
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by artist: Ludwig van Beethoven
by artist: Wilhelm Kempff
in album: Originals Beethoven Box
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popularity: 5
genre: classical
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: 2026-07-29T19:35:34Z
audio: Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": II. Introduzione. Adagio molto
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Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": III. Rondo. Allegretto moderato – Prestissimo
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by artist: Wilhelm Kempff
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popularity: 5
genre: classical
genre: classical-piano
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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: 2026-07-29T19:35:34Z
audio: Piano Sonata No. 21 in C Major, Op. 53 "Waldstein": III. Rondo. Allegretto moderato – Prestissimo
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Piano Sonata No. 23 in F Minor, Op. 57 "Appassionata": I. Allegro assai
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by artist: Wilhelm Kempff
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popularity: 5
genre: classical
genre: classical-piano
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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: 2026-07-08T03:20:19Z
audio: Piano Sonata No. 23 in F Minor, Op. 57 "Appassionata": I. Allegro assai
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Piano Sonata No. 23 in F Minor, Op. 57 "Appassionata": II. Andante con moto
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Irmgard Seefried (Recorded in 1944-1967)
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  audio: Alceste, Wq. 44 (Excerpts): Divinités du Styx
track: Orfeo ed Euridice, Wq. 30 (Excerpts): Ah, se intorno a quest'urna funestra
track: Alceste, Wq. 44 (Excerpts): Vivez, aimez des jours
track: Orfeo ed Euridice, Wq. 30 (Excerpts): Chiamo il mio ben così
track: Alceste, Wq. 44 (Excerpts): Parez vos fronts de fleurs nouvelles
track: Orfeo ed Euridice, Wq. 30 (Excerpts): Gli sguardi trattieni
track: Alceste, Wq. 44 (Excerpts): Vivre sans toi
track: Orfeo ed Euridice, Wq. 30 (Excerpts): Dance of the Blessed Spirits
track: Alceste, Wq. 44 (Excerpts): Recois, Dieu bienfaisant
track: Orfeo ed Euridice, Wq. 30 (Excerpts): Vieni appange il tuo consorte
track: Alceste, Wq. 44 (Excerpts): A mes amis
track: Orfeo ed Euridice, Wq. 30 (Excerpts): Che fiero momento
track: Iphigénie en Tauride, Wq. 46 (Excerpts): Des noirs pressentiments
track: Orfeo ed Euridice, Wq. 30 (Excerpts): Che faro senza Euridice?
track: Iphigénie en Tauride, Wq. 46 (Excerpts): Patrie infortunée
track: Orfeo ed Euridice, Wq. 30 (Excerpts): Trionfi amore
track: Iphigénie en Tauride, Wq. 46 (Excerpts): Et tu prétends encore
track: Paride ed Elena, Wq. 39 (Excerpts): Overture
track: Iphigénie en Tauride, Wq. 46 (Excerpts): Divinité de grandes âmes
track: Paride ed Elena, Wq. 39 (Excerpts): Non sdegnare, o bella Venere
track: Iphigénie en Tauride, Wq. 46 (Excerpts): Non, cet affreux devoir
track: Iphigénie en Tauride, Wq. 46 (Excerpts): O Diane, sois-nous propice
track: Iphigénie en Tauride, Wq. 46 (Excerpts): Les Dieux longtemps en courroux
track: Le cinesi, Wq. 18 (Excerpts): Son lungi e non mi brami
track: Le cinesi, Wq. 18 (Excerpts): Voli il piede in lieti giri

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subject of: OpenTimestamps Proof of Existence
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audio: Alceste, Wq. 44 (Excerpts): Vivez, aimez des jours
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Orfeo ed Euridice, Wq. 30 (Excerpts): Chiamo il mio ben così
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
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Alceste, Wq. 44 (Excerpts): Parez vos fronts de fleurs nouvelles
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by artist: Bavarian Radio Symphony Orchestra
by artist: Serge Baudo
by artist: Jessye Norman
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T04:47:22Z
audio: Alceste, Wq. 44 (Excerpts): Parez vos fronts de fleurs nouvelles
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Orfeo ed Euridice, Wq. 30 (Excerpts): Gli sguardi trattieni
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-08-01T00:10:46Z
audio: Orfeo ed Euridice, Wq. 30 (Excerpts): Gli sguardi trattieni
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Alceste, Wq. 44 (Excerpts): Vivre sans toi
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T08:30:10Z
audio: Alceste, Wq. 44 (Excerpts): Vivre sans toi
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Orfeo ed Euridice, Wq. 30 (Excerpts): Dance of the Blessed Spirits
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T17:29:52Z
audio: Orfeo ed Euridice, Wq. 30 (Excerpts): Dance of the Blessed Spirits
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Alceste, Wq. 44 (Excerpts): Recois, Dieu bienfaisant
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T22:27:30Z
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Orfeo ed Euridice, Wq. 30 (Excerpts): Vieni appange il tuo consorte
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by artist: Elisabeth Söderström
by artist: Dietrich Fischer-Dieskau
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popularity: 2
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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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Alceste, Wq. 44 (Excerpts): A mes amis
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Alceste, Wq. 44 (Excerpts): A mes amis
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Orfeo ed Euridice, Wq. 30 (Excerpts): Che fiero momento
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by artist: Ferdinand Leitner
by artist: Elisabeth Söderström
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genre: classical
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T12:24:41Z
audio: Orfeo ed Euridice, Wq. 30 (Excerpts): Che fiero momento
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Iphigénie en Tauride, Wq. 46 (Excerpts): Des noirs pressentiments
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genre: classical
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-30T18:23:33Z
audio: Iphigénie en Tauride, Wq. 46 (Excerpts): Des noirs pressentiments
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Orfeo ed Euridice, Wq. 30 (Excerpts): Che faro senza Euridice?
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T02:51:48Z
audio: Orfeo ed Euridice, Wq. 30 (Excerpts): Che faro senza Euridice?
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Iphigénie en Tauride, Wq. 46 (Excerpts): Patrie infortunée
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subject of: OpenTimestamps Proof of Existence
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Orfeo ed Euridice, Wq. 30 (Excerpts): Trionfi amore
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T17:29:52Z
audio: Orfeo ed Euridice, Wq. 30 (Excerpts): Trionfi amore
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Iphigénie en Tauride, Wq. 46 (Excerpts): Et tu prétends encore
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duration: PT3M14S
duration ms: 194360
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by artist: Christoph Willibald Gluck
by artist: Munich Radio Orchestra
by artist: Lamberto Gardelli
by artist: Franco Bonisolli
by artist: Walton Groenroos
in album: Gluck: Opera Gala
  type: MusicAlbum
  date published: 2020-12-04
popularity: 4
genre: classical
genre: opera
isrc code: DEB952020006
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T08:38:45Z
audio: Iphigénie en Tauride, Wq. 46 (Excerpts): Et tu prétends encore
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Paride ed Elena, Wq. 39 (Excerpts): Overture
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duration: PT4M19S
duration ms: 259972
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by artist: Christoph Willibald Gluck
by artist: Vienna Radio Symphony Orchestra
by artist: Anthony Spiri
by artist: Lothar Zagrosek
in album: Gluck: Opera Gala
  type: MusicAlbum
  date published: 2020-12-04
popularity: 2
genre: classical
genre: opera
isrc code: DEB958411801
additional property: CopyrightID
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additional property: CopyrightRegisteredAt
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a31374a1c6b59337aa681b36f9bb72fa24953d8cd0007c1fd668d7ef92ef5ff. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB958411801.
  date published: 2026-07-31T17:29:52Z
audio: Paride ed Elena, Wq. 39 (Excerpts): Overture
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Iphigénie en Tauride, Wq. 46 (Excerpts): Divinité de grandes âmes
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duration: PT2M8S
duration ms: 128613
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by artist: Christoph Willibald Gluck
by artist: Munich Radio Orchestra
by artist: Lamberto Gardelli
by artist: Franco Bonisolli
in album: Gluck: Opera Gala
  type: MusicAlbum
  date published: 2020-12-04
popularity: 3
genre: classical
genre: opera
isrc code: DEB952020007
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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: 2026-07-30T20:11:13Z
audio: Iphigénie en Tauride, Wq. 46 (Excerpts): Divinité de grandes âmes
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Paride ed Elena, Wq. 39 (Excerpts): Non sdegnare, o bella Venere
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duration: PT3M26S
duration ms: 206493
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by artist: Christoph Willibald Gluck
by artist: Vienna Radio Symphony Orchestra
by artist: Anthony Spiri
by artist: Lothar Zagrosek
by artist: Anne Tedards
by artist: Arnold Schoenberg Chor
by artist: Chor des Osterreichischen Rundfunks
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  date published: 2020-12-04
popularity: 2
genre: classical
genre: opera
isrc code: DEB958411802
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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: 2026-07-31T19:53:13Z
audio: Paride ed Elena, Wq. 39 (Excerpts): Non sdegnare, o bella Venere
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Iphigénie en Tauride, Wq. 46 (Excerpts): Non, cet affreux devoir
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duration: PT4M30S
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by artist: Munich Radio Orchestra
by artist: Lamberto Gardelli
by artist: Pilar Lorengar
in album: Gluck: Opera Gala
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  date published: 2020-12-04
popularity: 3
genre: classical
genre: opera
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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: 2026-07-31T09:50:11Z
audio: Iphigénie en Tauride, Wq. 46 (Excerpts): Non, cet affreux devoir
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Iphigénie en Tauride, Wq. 46 (Excerpts): O Diane, sois-nous propice
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by artist: Munich Radio Orchestra
by artist: Lamberto Gardelli
by artist: Bavarian Radio Chorus
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popularity: 36
genre: classical
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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: 2026-06-13T15:41:10Z
audio: Iphigénie en Tauride, Wq. 46 (Excerpts): O Diane, sois-nous propice
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Philippe Hirschhorn (1st Prize Queen Elisabeth International Competition 1967) [Live]
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Milestones of a Violin Legend: Wolfgang Schneiderhan, Vol. 7
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-29T21:51:49Z
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  genre: chamber-music
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-30T09:57:33Z
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  subject of: OpenTimestamps Proof of Existence
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track: Symphony No. 36 In C Major, K.425 - "Linz": 1. Adagio - Allegro spiritoso
track: Symphony No. 36 In C Major, K.425 - "Linz": 2. Andante

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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

OpenTimestamps Proof of Existence
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date published: 2026-07-30T14:44:50Z

Symphony No. 31 In D Major, K.297 - "Paris": 3. Allegro
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Symphony No. 36 In C Major, K.425 - "Linz": 1. Adagio - Allegro spiritoso
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T17:29:52Z
audio: Symphony No. 36 In C Major, K.425 - "Linz": 1. Adagio - Allegro spiritoso
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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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R. Strauss: Symphonic Poems & Horn Concerto No. 1
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Mozart: Symphony No. 36 in C Major, K. 425 "Linz" - Symphony No. 31 in D Major, K. 297 "Paris" - Les Petits Riens, K299b (Remastered)
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audio: Beethoven: Piano Concerto No. 5 in E-Flat Major, Op. 73 "Emperor": I. Allegro (Excerpt)
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Serenade No. 13 in G Major, K. 525 "Eine kleine Nachtmusik", I. Allegro
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by artist: Bach-Collegium Stuttgart
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-29T11:07:37Z
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T16:07:00Z
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