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  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  track: 6 Pieces, Op. 48: No. 5, —
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-08T03:20:19Z
    audio: 6 Pieces, Op. 48: No. 5, —
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  track: La vida breve, G. 35, La vida breve, Act II: Danza
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    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-31T06:42:11Z
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  track: Fantasía para un gentilhombre: IV. Allegro con brio
  track: Recuerdos de la Alhambra
  track: España, Op. 165: No. 2, Tango
  track: Valses poéticos: Melodico (Arr. J. McFadden)
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  track: Libro de Música de Vihuela de Mano "El Maestro": Pavana No. 1
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  track: Danzas fantasticas, Op. 22: Danzas fantasticas (Fantastic Dances), Op. 22: III. Orgia
album: Classical for Sleep
album: Spanish Classical Masterpieces
album: Melancholy Classical
album: Solemn Classical
album: Maso, Jordi: Catalan Piano Album (The)
album: 11 (Música catalana per a piano a quatre mans)
album: Classical Hidden Gems, Vol. 6
album: Virgo Maria (Solenne Cantata)
album: Blancafort: Complete Songs, Vol. 1
album: Blancafort, M.: Piano Music, Vol. 5
album: Concert Ibèric - Tríptico De La Piel De Toro
album: Blancafort, M.: Piano Music, Vol. 4 - American Souvenir / Sonatina Antiga / Ermita I Panorama / Romanca, Intermedi I Marxa
album: Blancafort, M.: Piano Music, Vol. 3 - Camins / Cants Intims Ii / El Parc D'Atraccions / Pastoral
album: Blancafort, M.: Piano Music, Vol. 2 - Jocs I Danses Al Camp / Cants Intims I
album: Blancafort, M.: Piano Music, Vol. 1 - Peces De Joventut / Cancons De Muntanya / Notes D'Antany
album: Katjusha
album: Canco de l'hivern
album: Carneriana
album: Miniatures Catalanes
album: A L'ombra del lledoner - Poesía de Tomàs Garcés
album: Cançons d'amor de compositors catalans
album: Vint cançons
album: Mompou and More
album: Armonía Entre Canto Música y Poesía: Canciones Napolitanas y Españolas de Concierto (Volumen 2)
album: Barcelona "Belle Époque"
album: Boost
album: Dialogues (Manuel Blancafort - Frederic Mompou)
album: Piano de la Generación del 27
album: Catalan Piano Music

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Fantasía para un gentilhombre: IV. Allegro con brio
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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
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Recuerdos de la Alhambra
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T08:26:41Z
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-31T19:53:13Z
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c1f30634a9568d5d173adf50edbc6e69cf3d1e16a51fabb0c714c81ec4533a. 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/HKI199610902.
  date published: 2026-07-08T03:20:19Z
audio: Valses poéticos: Melodico (Arr. J. McFadden)
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Suite Castellana: III. Danza
type: MusicRecording
duration: PT3M17S
duration ms: 197200
explicit: false
by artist: Federico Moreno Torroba
by artist: Vicente Coves
in album: La mejor música clásica española
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popularity: 0
isrc code: HKI191408216
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0797a46ab3f7532c48923752bf76d31bbc850df4bec2fad02e252bb4250fc94. 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/HKI191408216.
  date published: 2026-07-08T03:22:41Z
audio: Suite Castellana: III. Danza
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Libro de Música de Vihuela de Mano "El Maestro": Pavana No. 1
type: MusicRecording
duration: PT2M17S
duration ms: 137960
explicit: false
by artist: Luis de Milán
by artist: José Antonio Escobar
in album: La mejor música clásica española
  type: MusicAlbum
  date published: 2024-05-24
popularity: 0
isrc code: HKI191428923
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191428923
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: 2026-07-31T17:29:52Z
audio: Libro de Música de Vihuela de Mano "El Maestro": Pavana No. 1
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El amor brujo, Scene I (1915 Version): No. 4, Danza del fin del día
type: MusicRecording
duration: PT4M3S
duration ms: 243933
explicit: false
by artist: Manuel de Falla
by artist: Perspectives Ensemble
by artist: Angel Gil-Ordóñez
in album: La mejor música clásica española
  type: MusicAlbum
  date published: 2024-05-24
popularity: 0
isrc code: HKI191829904
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
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d39c0ac25f3f84965a79a05c06f49bdfa1e9c61016e70c8fb92bac74924807. 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/HKI191829904.
  date published: 2026-07-08T03:20:19Z
audio: El amor brujo, Scene I (1915 Version): No. 4, Danza del fin del día
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Suite española No. 1, Op. 47 (Arr. N. Kraft for Guitar): V. Asturias "Leyenda"
type: MusicRecording
duration: PT6M24S
duration ms: 384480
explicit: false
by artist: Isaac Albéniz
by artist: Norbert Kraft
in album: La mejor música clásica española
  type: MusicAlbum
  date published: 2024-05-24
popularity: 0
genre: classical
genre: classical-piano
isrc code: HKI199648001
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
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b00a940c0a3cfc239f23bcb78be0a9808f3d649e0c2bf69fc3dd0a95368591. 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/HKI199648001.
  date published: 2026-07-08T03:53:27Z
audio: Suite española No. 1, Op. 47 (Arr. N. Kraft for Guitar): V. Asturias "Leyenda"
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  additional property: Key Name
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4 Mazurkas: No. 3, Marieta
type: MusicRecording
duration: PT2M17S
duration ms: 137333
explicit: false
by artist: Francisco Tárrega
by artist: Norbert Kraft
in album: La mejor música clásica española
  type: MusicAlbum
  date published: 2024-05-24
popularity: 0
genre: spanish-classical
genre: late-romantic-era
isrc code: HKI199201220
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
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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 0x78b286417a51f905b68b3e5e9db0a4ec4757d25268d6bba25a50be6f0399bc04. 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/HKI199201220.
  date published: 2026-07-08T03:20:19Z
audio: 4 Mazurkas: No. 3, Marieta
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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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Danzas fantasticas, Op. 22: Danzas fantasticas (Fantastic Dances), Op. 22: III. Orgia
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duration: PT4M49S
duration ms: 289066
explicit: false
by artist: Joaquín Turina
by artist: Orquesta Sinfónica de Castilla y León
by artist: Max Bragado-Darman
in album: La mejor música clásica española
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  date published: 2024-05-24
popularity: 0
genre: chamber-music
isrc code: HKI190143906
additional property: CopyrightID
additional property: CopyrightStatus
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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
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eef7ecebf2f7be9895276df377fb71f2b3e562fe778f53020c0e3df4120f084. 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/HKI190143906.
  date published: 2026-07-08T03:20:19Z
audio: Danzas fantasticas, Op. 22: Danzas fantasticas (Fantastic Dances), Op. 22: III. Orgia
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Classical for Sleep
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Spanish Classical Masterpieces
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Melancholy Classical
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Solemn Classical
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11 (Música catalana per a piano a quatre mans)
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Classical Hidden Gems, Vol. 6
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Virgo Maria (Solenne Cantata)
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Blancafort: Complete Songs, Vol. 1
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Blancafort, M.: Piano Music, Vol. 5
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Concert Ibèric - Tríptico De La Piel De Toro
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Blancafort, M.: Piano Music, Vol. 4 - American Souvenir / Sonatina Antiga / Ermita I Panorama / Romanca, Intermedi I Marxa
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Blancafort, M.: Piano Music, Vol. 3 - Camins / Cants Intims Ii / El Parc D'Atraccions / Pastoral
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Blancafort, M.: Piano Music, Vol. 2 - Jocs I Danses Al Camp / Cants Intims I
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Blancafort, M.: Piano Music, Vol. 1 - Peces De Joventut / Cancons De Muntanya / Notes D'Antany
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Katjusha
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Canco de l'hivern
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Carneriana
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Miniatures Catalanes
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A L'ombra del lledoner - Poesía de Tomàs Garcés
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Cançons d'amor de compositors catalans
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Vint cançons
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Mompou and More
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Armonía Entre Canto Música y Poesía: Canciones Napolitanas y Españolas de Concierto (Volumen 2)
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Barcelona "Belle Époque"
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Boost
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Dialogues (Manuel Blancafort - Frederic Mompou)
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Piano de la Generación del 27
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Catalan Piano Music
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