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description: Helmut Walcha (27 October 1907 – 11 August 1991) was a German organist, harpsichordist, music teacher and composer who specialized in the works of the Dutch and German Baroque masters. Blind since hi
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album: Golden Violin vol.2 (Remastered 2020)
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album: Helmut Walcha plays Bach
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album: Bach: Goldberg Variations by Helmut Walcha
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album: Bach: The Art of Fugue, BWV 1080 by Helmut Walcha
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album: Organ Masters Before Bach
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album: Bach, J.S.: Organ Works – The Mono Cycle 1947 - 1952
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album: Bach: Orgel-Büchlein - Choral Preludes ’ Selection’ 1-45, Bwv 599-633 e 635-644 - Canonic Variation on ’Vom Himmel hoch, da komm ich her’, Bwv 769a - Meine Seele erhabt den Herren (Magnificat
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album: J.S. Bach: Works for Violin & Keyboard
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album: Bach: The Harpsichord Partitas
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album: Bach: Die Kunts Der Fuge BWV 1080
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album: Walcha: Chorale Preludes, Vol. 4
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album: Walcha: Chorale Preludes, Vol. 2
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  date published: 2012-12-04
album: Walcha: Chorale Preludes,, Vol. 1
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  date published: 2012-10-02
album: Bach: The Well-Tempered Clavier, Book 2, BWV 870-893, Clavicembalo (Remastered)
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album: Bach: The Well-Tempered Clavier, Book 1, BWV 846-869, Clavicembalo (Remastered)
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album: Bach: The Well-Tempered Clavier, Books 1 & 2: BWV 846-893 (Remastered)
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album: Bach: Goldberg Variations, BWV 988 (Remastered)
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album: Bach: Prelude and Fugue; Fantasia
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album: J.S. Bach: Toccata and Fugue in D minor, Trio Sonata No.6 in G major, Prelude and Fugue in C major, Trio Sonata No.1 in E flat major (Remastered)
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album: Helmut Walcha and Arturo Michelangeli Perform Bach and Schumann
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  date published: 2009-02-23
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album: Bach: Keyboard Works
album: Various: Orgelmeister vor Bach
album: The Works of Johann Sebastian Bach: Organ Works
album: The Works of Johann Sebastian Bach: Little Organ Book
album: The Works of Johann Sebastian Bach: Choral von Verschiedener Art
album: The Works of Johann Sebastian Bach: Achtzehn Chorale for Organ
album: Bach, J.S.: Organ Works
album: Bach "Dorian" Toccata And Fugue
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album: Buxtehude: Organ Works BuxWV 137, 139-142, 145-146, 149,159-160, Passacaglia BuxWV 161
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album: Bach, J.S.: Violin Sonatas Nos. 1-6
album: Das Schaffen Johannes Sebastian Bach: Serie F. Werke für Orgel (An der Orgel der Sankt Laurenskerk in Alkmaar) (Stereo Version)
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  subject of: OpenTimestamps Proof of Existence
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Bach: Organ Works / The 1947 - 1952 Recordings
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date published: 2003-01-01

Bach: Keyboard Works
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Various: Orgelmeister vor Bach
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The Works of Johann Sebastian Bach: Organ Works
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The Works of Johann Sebastian Bach: Little Organ Book
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The Works of Johann Sebastian Bach: Choral von Verschiedener Art
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The Works of Johann Sebastian Bach: Achtzehn Chorale for Organ
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Bach, J.S.: Organ Works
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-06T07:53:57Z
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-07-08T03:53:27Z
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track: Toccata and Fugue in D Minor, BWV 565: II. Fugue
track: Prelude and Fuge in B Minor, BWV 544: II. Fugue
track: Toccata and Fugue in F Major, BWV 540: I. Toccata
track: Prelude and Fugue in F Minor, BWV 534: I. Prelude
track: Prelude (Fantasy) and Fugue in C Minor, BWV 537: I. Fantasia
track: Toccata and Fugue in D Minor, BWV 538 "Dorian": II. Fuga
track: Trio Sonata No. 4 in E Minor, BWV 528: II. Andante
track: Trio Sonata No. 1 in E-Flat Major, BWV 525: I. (Allegro moderato)
track: Prelude (Fantasy) and Fugue in G Minor, BWV 542: I. Fantasy
track: Prelude and Fugue in G Major, BWV 541: I. Prelude
track: Trio Sonata No. 1 in E-Flat Major, BWV 525: III. Allegro
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OTSVerificationAPI
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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

OpenTimestamps Proof of Existence
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date published: 2026-07-08T03:39:04Z

Trio Sonata No. 2 in C Minor, BWV 526: I. Vivace
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Toccata and Fugue in D Minor, BWV 565: II. Fugue
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by artist: Helmut Walcha
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-21T21:15:57Z
audio: Toccata and Fugue in D Minor, BWV 565: II. Fugue
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subject of: OpenTimestamps Proof of Existence
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subject of: OpenTimestamps Proof of Existence
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Prelude and Fugue in F Minor, BWV 534: I. Prelude
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duration: PT4M31S
duration ms: 271733
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
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  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF056201141
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428254c238761b6c123360328cf5a5277ae8b0ba175600e154d66361e36c867c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF056201141.
  date published: 2026-07-08T08:56:20Z
audio: Prelude and Fugue in F Minor, BWV 534: I. Prelude
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Prelude (Fantasy) and Fugue in C Minor, BWV 537: I. Fantasia
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duration: PT4M36S
duration ms: 276400
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF056201111
additional property: CopyrightID
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additional property: CopyrightRegisteredAt
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056201111
additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcf50e2bd877e7c4354695675e2aba66e64dcb1ef4be050e67193acf4a89afc9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF056201111.
  date published: 2026-07-08T03:53:27Z
audio: Prelude (Fantasy) and Fugue in C Minor, BWV 537: I. Fantasia
  type: AudioObject
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  additional property: Mode (Major/Minor)
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Toccata and Fugue in D Minor, BWV 538 "Dorian": II. Fuga
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duration: PT7M8S
duration ms: 428106
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF056201062
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: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056201062
additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff94731466cb74cc13e0438cc288621c78ff8c5b874d8e4f7c99c4e6fb43355. 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/DEF056201062.
  date published: 2026-07-08T03:22:41Z
audio: Toccata and Fugue in D Minor, BWV 538 "Dorian": II. Fuga
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Trio Sonata No. 4 in E Minor, BWV 528: II. Andante
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duration: PT4M40S
duration ms: 280733
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF056904082
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: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056904082
additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a41d7fe4079a8e2027ab7b67190f35d6b427cc4891c728e5dc67b06b1ed8cb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF056904082.
  date published: 2026-07-08T03:53:27Z
audio: Trio Sonata No. 4 in E Minor, BWV 528: II. Andante
  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: 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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Trio Sonata No. 1 in E-Flat Major, BWV 525: I. (Allegro moderato)
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duration: PT3M13S
duration ms: 193133
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF055600031
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055600031
additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fa5712e67f4aaab86b7a04c06692a14b53445b9535c88581a7278010d20661. 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/DEF055600031.
  date published: 2026-07-08T03:22:41Z
audio: Trio Sonata No. 1 in E-Flat Major, BWV 525: I. (Allegro moderato)
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  additional property: Mode (Major/Minor)
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  additional property: Danceability
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Prelude (Fantasy) and Fugue in G Minor, BWV 542: I. Fantasy
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duration: PT6M10S
duration ms: 370800
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF056201071
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: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056201071
additional property: OTSTimestamp
  type: PropertyValue
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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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97896b793b8b0e6da2fa3145febe8a78d4d8237703010ace104d6c553dfb6e2a. 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/DEF056201071.
  date published: 2026-07-08T03:22:41Z
audio: Prelude (Fantasy) and Fugue in G Minor, BWV 542: I. Fantasy
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  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: Danceability
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  additional property: Energy
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Prelude and Fugue in G Major, BWV 541: I. Prelude
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duration: PT3M16S
duration ms: 196626
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF056201161
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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additional property: CopyrightChainExplorerURL
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additional property: OTSHash
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
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bd0f74fc6efdd42737771ef9314ebf74a3b05b91a26eb3746b91bb010746c3. 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/DEF056201161.
  date published: 2026-07-08T03:22:41Z
audio: Prelude and Fugue in G Major, BWV 541: I. Prelude
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Trio Sonata No. 1 in E-Flat Major, BWV 525: III. Allegro
type: MusicRecording
duration: PT4M21S
duration ms: 261493
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF055600033
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T12:27:40+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6d95589d17688cb0f72651faeb0df948099989c42ff79f5ca675c8c4a6dabde9
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957145
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055600033
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T08:56:20Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d95589d17688cb0f72651faeb0df948099989c42ff79f5ca675c8c4a6dabde9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF055600033.
  date published: 2026-07-08T08:56:20Z
audio: Trio Sonata No. 1 in E-Flat Major, BWV 525: III. Allegro
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 174.356
  additional property: Musical Key
    type: PropertyValue
    value: 3
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.124
  additional property: Energy
    type: PropertyValue
    value: 0.209
  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.579
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.067
  additional property: Valence (Positivity)
    type: PropertyValue
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  additional property: Loudness (dB)
    type: PropertyValue
    value: -18.511
  additional property: Key Name
    type: PropertyValue
    value: Eb
  additional property: Mode Name
    type: PropertyValue
    value: Major

Prelude and Fugue in G Major, BWV 541: II. Fugue
type: MusicRecording
duration: PT5M24S
duration ms: 324706
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Organ Works
  type: MusicAlbum
  date published: 2000-01-01
genre: classical
genre: classical-piano
isrc code: DEF056201162
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T16:33:07+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9bf15b4cf05f61b8d4c29bd14ca9cfb8da9a0525552e7b78743a698803d69460
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056201162
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf15b4cf05f61b8d4c29bd14ca9cfb8da9a0525552e7b78743a698803d69460. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEF056201162.
  date published: 2026-07-08T03:20:19Z
audio: Prelude and Fugue in G Major, BWV 541: II. Fugue
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 141.427
  additional property: Musical Key
    type: PropertyValue
    value: 7
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.174
  additional property: Energy
    type: PropertyValue
    value: 0.204
  additional property: Speechiness
    type: PropertyValue
    value: 0.032
  additional property: Acousticness
    type: PropertyValue
    value: 0.879
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.602
  additional property: Liveness
    type: PropertyValue
    value: 0.105
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.138
  additional property: Loudness (dB)
    type: PropertyValue
    value: -17.005
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
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    value: Major

Bach "Dorian" Toccata And Fugue
type: MusicAlbum
date published: 2000-01-01
track: "Dorian" Toccata And Fugue, BWV 538: Toccata
  type: MusicRecording
  duration: PT6M4S
  duration ms: 364092
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Helmut Walcha
  in album: Bach "Dorian" Toccata And Fugue
    type: MusicAlbum
    date published: 2000-01-01
  genre: classical
  genre: classical-piano
  isrc code: GBLGL1055844
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T15:50:10+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x724510927e70bc3d58e2d06ac7e19bdd3b841cee2cd0668d4b18147b2b428223
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957145
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957145
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLGL1055844
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T08:56:20Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724510927e70bc3d58e2d06ac7e19bdd3b841cee2cd0668d4b18147b2b428223. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLGL1055844.
    date published: 2026-07-08T08:56:20Z
  audio: "Dorian" Toccata And Fugue, BWV 538: Toccata
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 141.731
    additional property: Musical Key
      type: PropertyValue
      value: 9
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.181
    additional property: Energy
      type: PropertyValue
      value: 0.036
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.415
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.065
    additional property: Liveness
      type: PropertyValue
      value: 0.25
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.188
    additional property: Loudness (dB)
      type: PropertyValue
      value: -28.61
    additional property: Key Name
      type: PropertyValue
      value: A
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Bach, J.S.: Great Organ Works
type: MusicAlbum
date published: 1997-01-01
track: Toccata and Fugue in D Minor, BWV 565: I. Toccata
  type: MusicRecording
  duration: PT2M36S
  duration ms: 156093
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Helmut Walcha
  in album: Bach, J.S.: Great Organ Works
    type: MusicAlbum
    date published: 1997-01-01
  genre: classical
  genre: classical-piano
  isrc code: DEF055600011
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-09T08:49:12+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x032af7929a0540846ac95ce8bbc73b1bdb7788bdaa1b2a60e7a64b52ab4d6062
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055600011
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032af7929a0540846ac95ce8bbc73b1bdb7788bdaa1b2a60e7a64b52ab4d6062. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEF055600011.
    date published: 2026-07-08T03:20:19Z
  audio: Toccata and Fugue in D Minor, BWV 565: I. Toccata
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 142.685
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.207
    additional property: Energy
      type: PropertyValue
      value: 0.241
    additional property: Speechiness
      type: PropertyValue
      value: 0.037
    additional property: Acousticness
      type: PropertyValue
      value: 0.783
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.962
    additional property: Liveness
      type: PropertyValue
      value: 0.142
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.284
    additional property: Loudness (dB)
      type: PropertyValue
      value: -18.222
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Minor

Buxtehude: Organ Works BuxWV 137, 139-142, 145-146, 149,159-160, Passacaglia BuxWV 161
type: MusicAlbum
date published: 1989-01-01
track: Prelude and Fugue in D Major, BuxWV 139
  type: MusicRecording
  duration: PT5M52S
  duration ms: 352066
  explicit: false
  by artist: Dietrich Buxtehude
  by artist: Helmut Walcha
  in album: Buxtehude: Organ Works BuxWV 137, 139-142, 145-146, 149,159-160, Passacaglia BuxWV 161
    type: MusicAlbum
    date published: 1989-01-01
  genre: choral
  isrc code: DEF057701440
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-07T17:43:07+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x2ae58adab8a8d0b556bd1108080b2603f0c4dd2fe1daf11cc6e8b7c96b71a90b
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 957118
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/957118
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057701440
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-08T03:20:19Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae58adab8a8d0b556bd1108080b2603f0c4dd2fe1daf11cc6e8b7c96b71a90b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEF057701440.
    date published: 2026-07-08T03:20:19Z
  audio: Prelude and Fugue in D Major, BuxWV 139
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 94.496
    additional property: Musical Key
      type: PropertyValue
      value: 3
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.123
    additional property: Energy
      type: PropertyValue
      value: 0.123
    additional property: Speechiness
      type: PropertyValue
      value: 0.039
    additional property: Acousticness
      type: PropertyValue
      value: 0.905
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.147
    additional property: Liveness
      type: PropertyValue
      value: 0.069
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.093
    additional property: Loudness (dB)
      type: PropertyValue
      value: -21.421
    additional property: Key Name
      type: PropertyValue
      value: Eb
    additional property: Mode Name
      type: PropertyValue
      value: Major

Bach, J.S.: Toccata & Fugue BWV 565; Organ Works BWV 534, 542, 564 & 525
type: MusicAlbum
date published: 1986-01-01
track: Toccata and Fugue in D Minor, BWV 565: I. Toccata
  type: MusicRecording
  duration: PT2M38S
  duration ms: 158640
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Helmut Walcha
  in album: Bach, J.S.: Toccata & Fugue BWV 565; Organ Works BWV 534, 542, 564 & 525
    type: MusicAlbum
    date published: 1986-01-01
  genre: classical
  genre: classical-piano
  isrc code: DEF055600011
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-09T08:49:12+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x032af7929a0540846ac95ce8bbc73b1bdb7788bdaa1b2a60e7a64b52ab4d6062
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 953528
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/953528
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055600011
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-06-13T15:41:10Z
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032af7929a0540846ac95ce8bbc73b1bdb7788bdaa1b2a60e7a64b52ab4d6062. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEF055600011.
    date published: 2026-06-13T15:41:10Z
  audio: Toccata and Fugue in D Minor, BWV 565: I. Toccata
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 110.759
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 1
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.207
    additional property: Energy
      type: PropertyValue
      value: 0.205
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.655
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.947
    additional property: Liveness
      type: PropertyValue
      value: 0.256
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.222
    additional property: Loudness (dB)
      type: PropertyValue
      value: -18.573
    additional property: Key Name
      type: PropertyValue
      value: D
    additional property: Mode Name
      type: PropertyValue
      value: Major
track: Toccata and Fugue in D Minor, BWV 565: II. Fugue
  type: MusicRecording
  duration: PT6M48S
  duration ms: 408733
  explicit: false
  by artist: Johann Sebastian Bach
  by artist: Helmut Walcha
  in album: Bach, J.S.: Toccata & Fugue BWV 565; Organ Works BWV 534, 542, 564 & 525
    type: MusicAlbum
    date published: 1986-01-01
  genre: classical
  genre: classical-piano
  isrc code: DEF055600012
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-27T07:06:38+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xd2ab3d0398e8e07245db65ef30e9b468f6586a0202bee375ef1682f9124bad6f
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF055600012
  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
  subject of: OpenTimestamps Proof of Existence
    type: DigitalDocument
    encoding format: application/vnd.opentimestamps.ots
    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab3d0398e8e07245db65ef30e9b468f6586a0202bee375ef1682f9124bad6f. 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/DEF055600012.
    date published: 2026-07-02T03:55:08Z
  audio: Toccata and Fugue in D Minor, BWV 565: II. Fugue
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 106.007
    additional property: Musical Key
      type: PropertyValue
      value: 2
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
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    additional property: Valence (Positivity)
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    additional property: Loudness (dB)
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  by artist: Johann Sebastian Bach
  by artist: Helmut Walcha
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    date published: 1986-01-01
  genre: classical
  genre: classical-piano
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  additional property: OTSVerificationAPI
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  subject of: OpenTimestamps Proof of Existence
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track: Prelude (Fantasy) and Fugue in G Minor, BWV 542: I. Fantasy
track: Trio Sonata No. 1 in E-Flat Major, BWV 525: I. (Allegro moderato)
track: Trio Sonata No. 1 in E-Flat Major, BWV 525: III. Allegro

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OTSBitcoinBlockVerifyURL
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OTSVerificationAPI
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value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF056201141

OTSTimestamp
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value: 2026-07-08T03:53:27Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428254c238761b6c123360328cf5a5277ae8b0ba175600e154d66361e36c867c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF056201141.
date published: 2026-07-08T03:53:27Z

Prelude and Fugue in F Minor, BWV 534: I. Prelude
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: Valence (Positivity)
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additional property: Key Name
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Prelude (Fantasy) and Fugue in G Minor, BWV 542: I. Fantasy
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duration: PT6M15S
duration ms: 375533
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Toccata & Fugue BWV 565; Organ Works BWV 534, 542, 564 & 525
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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
  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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97896b793b8b0e6da2fa3145febe8a78d4d8237703010ace104d6c553dfb6e2a. 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/DEF056201071.
  date published: 2026-07-08T03:22:41Z
audio: Prelude (Fantasy) and Fugue in G Minor, BWV 542: I. Fantasy
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Trio Sonata No. 1 in E-Flat Major, BWV 525: I. (Allegro moderato)
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by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Toccata & Fugue BWV 565; Organ Works BWV 534, 542, 564 & 525
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genre: classical
genre: classical-piano
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2fa5712e67f4aaab86b7a04c06692a14b53445b9535c88581a7278010d20661. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEF055600031.
  date published: 2026-07-08T08:56:20Z
audio: Trio Sonata No. 1 in E-Flat Major, BWV 525: I. (Allegro moderato)
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Trio Sonata No. 1 in E-Flat Major, BWV 525: III. Allegro
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duration: PT4M23S
duration ms: 263893
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach, J.S.: Toccata & Fugue BWV 565; Organ Works BWV 534, 542, 564 & 525
  type: MusicAlbum
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genre: classical
genre: classical-piano
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additional property: CopyrightID
additional property: CopyrightStatus
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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: Trio Sonata No. 1 in E-Flat Major, BWV 525: III. Allegro
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Bach, J.S.: The Well-Tempered Clavier BWV 846-893
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date published: 1975-01-01

Bach, J.S.: Violin Sonatas Nos. 1-6
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Das Schaffen Johannes Sebastian Bach: Serie F. Werke für Orgel (An der Orgel der Sankt Laurenskerk in Alkmaar) (Stereo Version)
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Toccata and Fugue in D Minor, BWV 565: I. Toccata
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by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach 50, The Very Best Of Classical Music
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032af7929a0540846ac95ce8bbc73b1bdb7788bdaa1b2a60e7a64b52ab4d6062. 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/DEF055600011.
  date published: 2026-07-08T03:22:41Z
audio: Toccata and Fugue in D Minor, BWV 565: I. Toccata
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Toccata and Fugue in D Minor, BWV 565: II. Fugue
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duration: PT6M50S
duration ms: 410956
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach 50, The Very Best Of Classical Music
  type: MusicAlbum
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popularity: 5
genre: classical
genre: classical-piano
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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: 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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ab3d0398e8e07245db65ef30e9b468f6586a0202bee375ef1682f9124bad6f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEF055600012.
  date published: 2026-07-08T03:53:27Z
audio: Toccata and Fugue in D Minor, BWV 565: II. Fugue
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Toccata and Fugue in D Minor, BWV 565. Toccata
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duration: PT2M45S
duration ms: 165600
explicit: false
by artist: Johann Sebastian Bach
by artist: Helmut Walcha
in album: Bach
  type: MusicAlbum
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popularity: 1
genre: classical
genre: classical-piano
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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
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a82d34d6394db986912bdd1878085ae56842d7bee9d368a5edc80f472425b33. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR6V80535061.
  date published: 2026-07-08T03:39:04Z
audio: Toccata and Fugue in D Minor, BWV 565. Toccata
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  additional property: Loudness (dB)
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  additional property: Key Name
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    value: D
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