Collectif A Contresens
type: MusicGroup
genre: avant-garde
genre: experimental
popularity: 2
followers: 25
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xf2d96c427042c8735466c8b0f56b091d991526d1798778fadf76c136f0722060
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954533
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954533
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a726f876-5704-4e22-9c4b-12c0f2e71f11.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a726f876-5704-4e22-9c4b-12c0f2e71f11.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a726f876-5704-4e22-9c4b-12c0f2e71f11
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xf2d96c427042c8735466c8b0f56b091d991526d1798778fadf76c136f0722060","name":"Collectif A Contresens","registered_at":"2026-06-20T07:38:46Z","symbol":"NIM1559751","token_address":"0x87fbf71b89e0f12f8eaf64ee9bef3506201f94b7","type":"artist","uuid":"a726f876-5704-4e22-9c4b-12c0f2e71f11"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d96c427042c8735466c8b0f56b091d991526d1798778fadf76c136f0722060. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a726f876-5704-4e22-9c4b-12c0f2e71f11.json and https://artists.proofprofile.net/proofs/artist/a726f876-5704-4e22-9c4b-12c0f2e71f11.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0xf2d96c427042c8735466c8b0f56b091d991526d1798778fadf76c136f0722060","name":"Collectif A Contresens","registered_at":"2026-06-20T07:38:46Z","symbol":"NIM1559751","token_address":"0x87fbf71b89e0f12f8eaf64ee9bef3506201f94b7","type":"artist","uuid":"a726f876-5704-4e22-9c4b-12c0f2e71f11"}
album: No Parking
  type: MusicAlbum
  date published: 2018-06-08
album: No Parking
  type: MusicAlbum
  date published: 2019-03-08
album: No Parking (Radio Edit)
  type: MusicAlbum
  date published: 2020-01-31
album: No Parking (Instrumental Version)
  type: MusicAlbum
  date published: 2021-03-17