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genre: classical
popularity: 41
followers: 1845
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additional property: OTSVerifyInstructions
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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
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-12T21:20:00Z
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album: Corazonando
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  date published: 2003
  track: Mielero Soy
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    genre: classical
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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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      date published: 2026-07-22T06:35:40Z
    audio: Mielero Soy
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album: Corazonando
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track: 3 Nocturnes for Cello and Guitar: Nocturne No. 1 in A Minor - Andantino
track: Nacht und Träume, Op. 43 No. 2, D. 827 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
track: 3 Nocturnes for Cello and Guitar: Nocturne No. 3 in C Major - Allegro moderato
track: Die Nacht (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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  by artist: Anja Lechner
  by artist: Pablo Marquez
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  additional property: OTSVerifyInstructions
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  subject of: OpenTimestamps Proof of Existence
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    date published: 2026-06-13T12:53:06Z
  audio: Die Nacht (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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track: Winterreise, D. 911: 24. Der Leiermann (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
track: Sonata for Arpeggione and Piano in A Minor, D. 821: 1. Allegro moderato (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
track: Sonata for Arpeggione and Piano in A Minor, D. 821: 2. Adagio (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
track: Meeres Stille, Op. 3 No. 2, D. 216 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
track: 3 Nocturnes for Cello and Guitar: Nocturne No. 2 in F Major - Adagio cantabile
track: Rosamunde, D. 797: 3b. Romanze. Der Vollmond strahlt auf Bergeshöh’n (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
track: 3 Nocturnes for Cello and Guitar: Nocturne No. 1 in A Minor - Andantino - Var.
track: Schubert: Die Nacht, D. deest (Arr. Lechner/Márquez for Cello & Guitar)
track: Sonata for Arpeggione and Piano in A Minor, D. 821: 3. Allegretto (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
track: Fischerweise, Op. 96 No. 4, D. 881 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)

3 Nocturnes for Cello and Guitar: Nocturne No. 1 in A Minor - Andantino
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by artist: Friedrich Burgmüller
by artist: Anja Lechner
by artist: Pablo Marquez
in album: Schubert: Die Nacht
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genre: classical-piano
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:53:06Z
audio: 3 Nocturnes for Cello and Guitar: Nocturne No. 1 in A Minor - Andantino
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Nacht und Träume, Op. 43 No. 2, D. 827 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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by artist: Anja Lechner
by artist: Pablo Marquez
in album: Schubert: Die Nacht
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  date published: 2018-11-02
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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: Nacht und Träume, Op. 43 No. 2, D. 827 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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3 Nocturnes for Cello and Guitar: Nocturne No. 3 in C Major - Allegro moderato
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by artist: Anja Lechner
by artist: Pablo Marquez
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genre: classical-piano
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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
additional property: ProofProfileEvidenceStatus
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T12:53:06Z
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Winterreise, D. 911: 24. Der Leiermann (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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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
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  date published: 2026-07-02T03:55:08Z
audio: Winterreise, D. 911: 24. Der Leiermann (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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Sonata for Arpeggione and Piano in A Minor, D. 821: 1. Allegro moderato (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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duration: PT12M45S
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by artist: Anja Lechner
by artist: Pablo Marquez
in album: Schubert: Die Nacht
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genre: classical
genre: classical-piano
genre: chamber-music
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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
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  date published: 2026-07-07T09:18:01Z
audio: Sonata for Arpeggione and Piano in A Minor, D. 821: 1. Allegro moderato (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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Sonata for Arpeggione and Piano in A Minor, D. 821: 2. Adagio (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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duration ms: 245573
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by artist: Franz Schubert
by artist: Anja Lechner
by artist: Pablo Marquez
in album: Schubert: Die Nacht
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genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEB331655507
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-22T12:33:25Z
audio: Sonata for Arpeggione and Piano in A Minor, D. 821: 2. Adagio (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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Meeres Stille, Op. 3 No. 2, D. 216 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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by artist: Anja Lechner
by artist: Pablo Marquez
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genre: classical
genre: classical-piano
genre: chamber-music
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
  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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T15:41:10Z
audio: Meeres Stille, Op. 3 No. 2, D. 216 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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3 Nocturnes for Cello and Guitar: Nocturne No. 2 in F Major - Adagio cantabile
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by artist: Anja Lechner
by artist: Pablo Marquez
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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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additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-06-13T17:25:41Z
audio: 3 Nocturnes for Cello and Guitar: Nocturne No. 2 in F Major - Adagio cantabile
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Rosamunde, D. 797: 3b. Romanze. Der Vollmond strahlt auf Bergeshöh’n (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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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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additional property: TokenDeploymentConfirmed
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  date published: 2026-07-02T03:55:08Z
audio: Rosamunde, D. 797: 3b. Romanze. Der Vollmond strahlt auf Bergeshöh’n (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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3 Nocturnes for Cello and Guitar: Nocturne No. 1 in A Minor - Andantino - Var.
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additional property: OTSVerificationAPI
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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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ba87b8bf65b76d66992dc767ad7d542085bd125bdff5dac8f990c081ab0a8f. 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/DEB331655513.
  date published: 2026-07-02T03:55:08Z
audio: 3 Nocturnes for Cello and Guitar: Nocturne No. 1 in A Minor - Andantino - Var.
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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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  additional property: Speechiness
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  additional property: Acousticness
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  additional property: Valence (Positivity)
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Sonata for Arpeggione and Piano in A Minor, D. 821: 3. Allegretto (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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duration: PT9M39S
duration ms: 579426
explicit: false
by artist: Franz Schubert
by artist: Anja Lechner
by artist: Pablo Marquez
in album: Schubert: Die Nacht
  type: MusicAlbum
  date published: 2018-11-02
genre: classical
genre: classical-piano
genre: chamber-music
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a66f9b46dbcb11920df513c9606c3022afeb1e6d06e7bc82a5831e0b8c7592f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DEB331655508.
  date published: 2026-07-29T15:22:21Z
audio: Sonata for Arpeggione and Piano in A Minor, D. 821: 3. Allegretto (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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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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    type: PropertyValue
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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)
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  additional property: Loudness (dB)
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isrc code: DEB331655508
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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additional property: OTSVerificationAPI
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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331655508
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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 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

Fischerweise, Op. 96 No. 4, D. 881 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
type: MusicRecording
duration: PT2M23S
duration ms: 143000
explicit: false
by artist: Franz Schubert
by artist: Anja Lechner
by artist: Pablo Marquez
in album: Schubert: Die Nacht
  type: MusicAlbum
  date published: 2018-11-02
genre: classical
genre: classical-piano
genre: chamber-music
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4d1dcbdc40762c7026e17cf47b4348d49c0ce4e00102ee18c9943a98909461. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DEB331655509.
  date published: 2026-07-29T12:35:17Z
audio: Fischerweise, Op. 96 No. 4, D. 881 (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
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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: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
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  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.353
  additional property: Loudness (dB)
    type: PropertyValue
    value: -26.275
  additional property: Key Name
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isrc code: DEB331655509
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
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additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960105
additional property: BitcoinTime
  type: PropertyValue
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331655509
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960105
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-29T12:35:17+00:00
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

Acousticness
type: PropertyValue
value: 0.98

Instrumentalness
type: PropertyValue
value: 0.912

Liveness
type: PropertyValue
value: 0.091

Valence (Positivity)
type: PropertyValue
value: 0.17

Loudness (dB)
type: PropertyValue
value: -29.558

Key Name
type: PropertyValue
value: G

Mode Name
type: PropertyValue
value: Major

Die Nacht (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
type: MusicRecording
duration: PT2M23S
duration ms: 143266
explicit: false
by artist: Franz Schubert
by artist: Anja Lechner
by artist: Pablo Marquez
in album: Schubert: Die Nacht (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
  type: MusicAlbum
  date published: 2018-10-05
genre: classical
genre: classical-piano
genre: chamber-music
isrc code: DEB331655504
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
  type: PropertyValue
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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/DEB331655504
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 0x0fd726eb981e617722953d91bb0dd92fa3e3f3f278ab1185774d169e34cf0fa8. 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/DEB331655504.
  date published: 2026-06-13T15:41:10Z
audio: Die Nacht (Arr. for Cello and Guitar by Anja Lechner and Pablo Márquez)
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Musical Key
    type: PropertyValue
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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
    type: PropertyValue
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  additional property: Energy
    type: PropertyValue
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
    type: PropertyValue
    value: 0.98
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.912
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.17
  additional property: Loudness (dB)
    type: PropertyValue
    value: -27.021
  additional property: Key Name
    type: PropertyValue
    value: G
  additional property: Mode Name
    type: PropertyValue
    value: Major

Schubert: Die Nacht, D. deest (Arr. Lechner/Márquez for Cello & Guitar)
type: MusicRecording
duration: PT2M23S
duration ms: 143255
explicit: false
by artist: Anja Lechner
by artist: Pablo Marquez
in album: Música de Estudio
  type: MusicAlbum
  date published: 2023-10-20
genre: classical
isrc code: DEB331655504
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
  value: https://blockstream.info/api/block-height/957145
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB331655504
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 0x0fd726eb981e617722953d91bb0dd92fa3e3f3f278ab1185774d169e34cf0fa8. 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/DEB331655504.
  date published: 2026-07-08T08:56:20Z
audio: Schubert: Die Nacht, D. deest (Arr. Lechner/Márquez for Cello & Guitar)
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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: Time Signature
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  additional property: Danceability
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  additional property: Energy
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  additional property: Speechiness
    type: PropertyValue
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  additional property: Acousticness
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  additional property: Instrumentalness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
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