Sébastien Billard
type: MusicGroup
genre: minimalism
popularity: 13
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc5614714efb9331b45c2bc6e70ccffbca643036f631efeada808dba7548de310
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953670
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953670
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/57d721b7-8a22-4d04-80b4-c0d5d8f1f61c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/57d721b7-8a22-4d04-80b4-c0d5d8f1f61c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/57d721b7-8a22-4d04-80b4-c0d5d8f1f61c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T18:07:12Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc5614714efb9331b45c2bc6e70ccffbca643036f631efeada808dba7548de310","name":"Sébastien Billard","registered_at":"2026-06-14T13:45:48Z","symbol":"NIM0471476","token_address":"0xbbd8018057b4d925326b508bcd9e00592989de49","type":"artist","uuid":"57d721b7-8a22-4d04-80b4-c0d5d8f1f61c"}
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 0xc5614714efb9331b45c2bc6e70ccffbca643036f631efeada808dba7548de310. Chain 2 (Bitcoin): anchored in block 953670 (2026-06-14T18:07:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57d721b7-8a22-4d04-80b4-c0d5d8f1f61c.json and https://artists.proofprofile.net/proofs/artist/57d721b7-8a22-4d04-80b4-c0d5d8f1f61c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T18:07:12Z
  text: {"copyright_id":"0xc5614714efb9331b45c2bc6e70ccffbca643036f631efeada808dba7548de310","name":"Sébastien Billard","registered_at":"2026-06-14T13:45:48Z","symbol":"NIM0471476","token_address":"0xbbd8018057b4d925326b508bcd9e00592989de49","type":"artist","uuid":"57d721b7-8a22-4d04-80b4-c0d5d8f1f61c"}
album: Grands concertos du XXème siècle
  type: MusicAlbum
  date published: 2017-10-20