Les 9
type: MusicGroup
popularity: 2
followers: 120
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x952619bde6cbe44b4163882777f4a2b592bded66e20aba457aa4cc3b2a018877
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954553
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954553
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/add521ab-d935-467f-8bd6-6ff28fb73493.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/add521ab-d935-467f-8bd6-6ff28fb73493.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/add521ab-d935-467f-8bd6-6ff28fb73493
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T11:51:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x952619bde6cbe44b4163882777f4a2b592bded66e20aba457aa4cc3b2a018877","name":"Les 9","registered_at":"2026-06-20T10:18:04Z","symbol":"NIM1593394","token_address":"0xd59d3b7c4338283095e815a79d5b3bb8e4938981","type":"artist","uuid":"add521ab-d935-467f-8bd6-6ff28fb73493"}
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 0x952619bde6cbe44b4163882777f4a2b592bded66e20aba457aa4cc3b2a018877. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/add521ab-d935-467f-8bd6-6ff28fb73493.json and https://artists.proofprofile.net/proofs/artist/add521ab-d935-467f-8bd6-6ff28fb73493.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T11:51:30Z
  text: {"copyright_id":"0x952619bde6cbe44b4163882777f4a2b592bded66e20aba457aa4cc3b2a018877","name":"Les 9","registered_at":"2026-06-20T10:18:04Z","symbol":"NIM1593394","token_address":"0xd59d3b7c4338283095e815a79d5b3bb8e4938981","type":"artist","uuid":"add521ab-d935-467f-8bd6-6ff28fb73493"}
album: Consonance
  type: MusicAlbum
  date published: 2022-09-02
album: Nocturne
  type: MusicAlbum
  date published: 2023-11-08
track: Nocturne in C-sharp Minor No. 20, B. 49: Lento con gran espressione (Arr. for Cellos and Double Bass by Francis Choinière and Joey Reda)
  type: MusicRecording
  duration: PT4M44S
  duration ms: 284200
  explicit: false
  by artist: Frédéric Chopin
  by artist: Vincent Belanger
  by artist: Les 9
  by artist: Noémie Raymond
  in album: Nocturne
    type: MusicAlbum
    date published: 2023-11-08
  genre: classical
  genre: early-romantic-era
  genre: polish-classical
  isrc code: CBB8S2200046
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-29T21:12:31+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0xc829871ee0fe70710a0a8a1a8b80705f2bb7b4feaabfbeff9703bc94baaa6564
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 960150
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/960150
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CBB8S2200046
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-29T21:51:49Z
  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 0xc829871ee0fe70710a0a8a1a8b80705f2bb7b4feaabfbeff9703bc94baaa6564. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CBB8S2200046.
    date published: 2026-07-29T21:51:49Z
  audio: Nocturne in C-sharp Minor No. 20, B. 49: Lento con gran espressione (Arr. for Cellos and Double Bass by Francis Choinière and Joey Reda)
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 110.938
    additional property: Musical Key
      type: PropertyValue
      value: 1
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.106
    additional property: Energy
      type: PropertyValue
      value: 0.106
    additional property: Speechiness
      type: PropertyValue
      value: 0.045
    additional property: Acousticness
      type: PropertyValue
      value: 0.968
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.898
    additional property: Liveness
      type: PropertyValue
      value: 0.075
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.054
    additional property: Loudness (dB)
      type: PropertyValue
      value: -26.637
    additional property: Key Name
      type: PropertyValue
      value: C#
    additional property: Mode Name
      type: PropertyValue
      value: Minor