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followers: 43
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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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album: Scarlatti: Sonatas Played on 5 Different Instruments
  type: MusicAlbum
  date published: 2020-09-12
album: Bach: Sonatas for Viola & Harpsichord
  type: MusicAlbum
  date published: 2022-10-07
album: C.P.E Bach: Sonatas for Viola da gamba & Harpsichord
  type: MusicAlbum
  date published: 2022-01-07
album: D. Scarlatti: Sonatas
  type: MusicAlbum
  date published: 2019-04-26
album: Vivaldi: Mandolin and Lute Concerti
  type: MusicAlbum
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    by artist: L'Arte dell' Arco
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    by artist: Davide Rebuffa
    by artist: Federico Guglielmo
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    additional property: OTSVerifyInstructions
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      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-02T03:30:09Z
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    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
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      date published: 2026-07-02T03:30:09Z
    audio: Concerto for 2 Mandolins in G Major for Strings and Continuo, RV 532: II. Andante
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  track: Concerto in C Major for Mandolin, Strings and Continuo, RV 425: I. Allegro
  track: Concerto in C Major for Mandolin, Strings and Continuo, RV 425: II. Largo
  track: Concerto in C Major for Mandolin, Strings and Continuo, RV 425: III. Allegro
  track: Trio in G Minor for Violin, Lute and Basso, RV 85: I. Andante molto
  track: Trio in G Minor for Violin, Lute and Basso, RV 85: II. Larghetto
  track: Trio in G Minor for Violin, Lute and Basso, RV 85: III. Allegro
  track: Concerto in D Major for 2 Violins, Lute and Basso, RV 93: I. Allegro
  track: Concerto in D Major for 2 Violins, Lute and Basso, RV 93: II. Largo
  track: Concerto in D Major for 2 Violins, Lute and Basso, RV 93: III. Allegro
  track: Trio in C Major for Violin, Lute and Basso, RV 82: I. Allegro
  track: Trio in C Major for Violin, Lute and Basso, RV 82: II. Larghetto
  track: Trio in C Major for Violin, Lute and Basso, RV 82: III. Allegro
  track: Concerto in A Major for Harpsichord, Strings and Continuo, RV 780: I. Allegro
  track: Concerto in A Major for Harpsichord, Strings and Continuo, RV 780: III. Allegro
album: Le otto stagioni: Stravinskij Chamber Orchestra Play Vivaldi & Piazzolla
album: Jommelli: Miserere, 5 Duetti Sacri
album: A Cinque: String Sonatas between XVII & XVIII Century

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Concerto for 2 Mandolins in G Major for Strings and Continuo, RV 532: III. Allegro
type: MusicRecording
duration: PT3M32S
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by artist: L'Arte dell' Arco
by artist: Mauro Squillante
by artist: Davide Rebuffa
by artist: Federico Guglielmo
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additional property: OTSVerifyInstructions
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  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
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by artist: Federico Guglielmo
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additional property: OTSVerifyInstructions
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:30:09Z
audio: Concerto in C Major for Mandolin, Strings and Continuo, RV 425: I. Allegro
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Concerto in C Major for Mandolin, Strings and Continuo, RV 425: II. Largo
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by artist: Federico Guglielmo
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  date published: 2010
isrc code: NLY331003460
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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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  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331003460
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-02T03:55:08Z
audio: Concerto in C Major for Mandolin, Strings and Continuo, RV 425: III. Allegro
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Trio in G Minor for Violin, Lute and Basso, RV 85: I. Andante molto
type: MusicRecording
duration: PT4M2S
duration ms: 242786
explicit: false
by artist: Antonio Vivaldi
by artist: L'Arte dell' Arco
by artist: Diego Cantalupi
by artist: Federico Guglielmo
in album: Vivaldi: Mandolin and Lute Concerti
  type: MusicAlbum
  date published: 2010
isrc code: NLY331003461
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111074648192ad63705c53c4033a4f7ff11ffe9c031aeaa4ba41d50467c21540. 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/NLY331003461.
  date published: 2026-07-02T03:55:08Z
audio: Trio in G Minor for Violin, Lute and Basso, RV 85: I. Andante molto
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Trio in G Minor for Violin, Lute and Basso, RV 85: II. Larghetto
type: MusicRecording
duration: PT3M1S
duration ms: 181560
explicit: false
by artist: Antonio Vivaldi
by artist: L'Arte dell' Arco
by artist: Diego Cantalupi
by artist: Federico Guglielmo
in album: Vivaldi: Mandolin and Lute Concerti
  type: MusicAlbum
  date published: 2010
isrc code: NLY331003462
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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/NLY331003462
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: 2026-07-02T03:55:08Z
audio: Trio in G Minor for Violin, Lute and Basso, RV 85: II. Larghetto
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Trio in G Minor for Violin, Lute and Basso, RV 85: III. Allegro
type: MusicRecording
duration: PT1M51S
duration ms: 111640
explicit: false
by artist: Antonio Vivaldi
by artist: L'Arte dell' Arco
by artist: Diego Cantalupi
by artist: Federico Guglielmo
in album: Vivaldi: Mandolin and Lute Concerti
  type: MusicAlbum
  date published: 2010
isrc code: NLY331003463
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
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf04fc96a4a2c23d778a1cfe4549dea3ef775982e63336ae269e7893c815cdcc. 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/NLY331003463.
  date published: 2026-07-02T03:55:08Z
audio: Trio in G Minor for Violin, Lute and Basso, RV 85: III. Allegro
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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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Concerto in D Major for 2 Violins, Lute and Basso, RV 93: I. Allegro
type: MusicRecording
duration: PT3M29S
duration ms: 209173
explicit: false
by artist: Antonio Vivaldi
by artist: L'Arte dell' Arco
by artist: Diego Cantalupi
by artist: Federico Guglielmo
in album: Vivaldi: Mandolin and Lute Concerti
  type: MusicAlbum
  date published: 2010
isrc code: NLY331003464
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
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331003464
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16011ae44dad049aa59828016be1904fa4b1dcdda77b15b5d64234096ad67fb5. 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/NLY331003464.
  date published: 2026-07-02T03:55:08Z
audio: Concerto in D Major for 2 Violins, Lute and Basso, RV 93: I. Allegro
  type: AudioObject
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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  additional property: Time Signature
    type: PropertyValue
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  additional property: Danceability
    type: PropertyValue
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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: Liveness
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  additional property: Valence (Positivity)
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  additional property: Loudness (dB)
    type: PropertyValue
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  additional property: Key Name
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Concerto in D Major for 2 Violins, Lute and Basso, RV 93: II. Largo
type: MusicRecording
duration: PT4M11S
duration ms: 251173
explicit: false
by artist: Antonio Vivaldi
by artist: L'Arte dell' Arco
by artist: Diego Cantalupi
by artist: Federico Guglielmo
in album: Vivaldi: Mandolin and Lute Concerti
  type: MusicAlbum
  date published: 2010
isrc code: NLY331003465
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/956304
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLY331003465
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f1e22fa6f1cb528ae2df188b69de7c7b42e1fbc590e74ca2f187a2242038c7. 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/NLY331003465.
  date published: 2026-07-02T03:55:08Z
audio: Concerto in D Major for 2 Violins, Lute and Basso, RV 93: II. Largo
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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: Valence (Positivity)
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  additional property: Loudness (dB)
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Concerto in D Major for 2 Violins, Lute and Basso, RV 93: III. Allegro
type: MusicRecording
duration: PT2M11S
duration ms: 131146
explicit: false
by artist: Antonio Vivaldi
by artist: L'Arte dell' Arco
by artist: Diego Cantalupi
by artist: Federico Guglielmo
in album: Vivaldi: Mandolin and Lute Concerti
  type: MusicAlbum
  date published: 2010
isrc code: NLY331003466
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
  type: PropertyValue
  value: 2026-07-02T03:55:08Z
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e6580ba6b278de95a46f14e2b1905819218365f442ebbc4b132342327346e8. 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/NLY331003466.
  date published: 2026-07-02T03:55:08Z
audio: Concerto in D Major for 2 Violins, Lute and Basso, RV 93: III. Allegro
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  additional property: Musical Key
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  additional property: Mode (Major/Minor)
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Trio in C Major for Violin, Lute and Basso, RV 82: I. Allegro
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Trio in C Major for Violin, Lute and Basso, RV 82: II. Larghetto
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Trio in C Major for Violin, Lute and Basso, RV 82: III. Allegro
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Concerto in A Major for Harpsichord, Strings and Continuo, RV 780: I. Allegro
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Concerto in A Major for Harpsichord, Strings and Continuo, RV 780: III. Allegro
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Le otto stagioni: Stravinskij Chamber Orchestra Play Vivaldi & Piazzolla
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date published: 1999-07-01

Jommelli: Miserere, 5 Duetti Sacri
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A Cinque: String Sonatas between XVII & XVIII Century
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