Ad Libitum Quartet
type: MusicGroup
genre: chamber music
popularity: 5
followers: 130
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x50cc4b5231378aa319cbcc8fcfb80eeaf4ffeddf3abbb8fa652491f5c199f353
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6a9b1e53-3e3f-408d-9097-60b5dc029c13.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6a9b1e53-3e3f-408d-9097-60b5dc029c13.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6a9b1e53-3e3f-408d-9097-60b5dc029c13
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x50cc4b5231378aa319cbcc8fcfb80eeaf4ffeddf3abbb8fa652491f5c199f353","name":"Ad Libitum Quartet","registered_at":"2026-06-17T02:48:48Z","symbol":"NIM1257336","token_address":"0x14d4e68d6a6620d673c886adbcc4c27499ba5a7f","type":"artist","uuid":"6a9b1e53-3e3f-408d-9097-60b5dc029c13"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  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
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cc4b5231378aa319cbcc8fcfb80eeaf4ffeddf3abbb8fa652491f5c199f353. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a9b1e53-3e3f-408d-9097-60b5dc029c13.json and https://artists.proofprofile.net/proofs/artist/6a9b1e53-3e3f-408d-9097-60b5dc029c13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x50cc4b5231378aa319cbcc8fcfb80eeaf4ffeddf3abbb8fa652491f5c199f353","name":"Ad Libitum Quartet","registered_at":"2026-06-17T02:48:48Z","symbol":"NIM1257336","token_address":"0x14d4e68d6a6620d673c886adbcc4c27499ba5a7f","type":"artist","uuid":"6a9b1e53-3e3f-408d-9097-60b5dc029c13"}
album: Faure / Ravel: String Quartets
  type: MusicAlbum
  date published: 2000-04-13
  track: String Quartet in E Minor, Op. 121: III. Allegro
    type: MusicRecording
    duration: PT9M18S
    duration ms: 558773
    explicit: false
    by artist: Ad Libitum Quartet
    in album: Faure / Ravel: String Quartets
      type: MusicAlbum
      date published: 2000-04-13
    genre: chamber music
    isrc code: HKI199929007
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T17:05:47+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x290ce4ea806b098d5663ea4fd4d6c74f4e4eee176198cfda57c1b9867badb90b
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958761
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958761
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199929007
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T17:49:48Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290ce4ea806b098d5663ea4fd4d6c74f4e4eee176198cfda57c1b9867badb90b. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/HKI199929007.
      date published: 2026-07-19T17:49:48Z
    audio: String Quartet in E Minor, Op. 121: III. Allegro
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 136.338
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.179
      additional property: Energy
        type: PropertyValue
        value: 0.04
      additional property: Speechiness
        type: PropertyValue
        value: 0.048
      additional property: Acousticness
        type: PropertyValue
        value: 0.946
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.648
      additional property: Liveness
        type: PropertyValue
        value: 0.063
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.102
      additional property: Loudness (dB)
        type: PropertyValue
        value: -28.206
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Fauré / Ravel: String Quartets
  type: MusicAlbum
  date published: 2000-04-13
album: Fauré / Ravel: String Quartets
  type: MusicAlbum
  date published: 2000-04-13
album: Fauré / Ravel: String Quartets
  type: MusicAlbum
  date published: 2000-04-13