Eugénie Lefebvre
type: MusicGroup
popularity: 6
followers: 99
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6f283a05b91fb8acf3f26cd8d2691c097336bf9c58b5725da169b8e7ca520282
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954728
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954728
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f89a35ed-4972-400b-b43c-079e6e83d572.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/f89a35ed-4972-400b-b43c-079e6e83d572.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/f89a35ed-4972-400b-b43c-079e6e83d572
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T18:08:38Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6f283a05b91fb8acf3f26cd8d2691c097336bf9c58b5725da169b8e7ca520282","name":"Eugénie Lefebvre","registered_at":"2026-06-21T16:09:13Z","symbol":"NIM1969944","token_address":"0x6c655eb3ddaa870531cf51bb01915fd7a3d416a2","type":"artist","uuid":"f89a35ed-4972-400b-b43c-079e6e83d572"}
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 0x6f283a05b91fb8acf3f26cd8d2691c097336bf9c58b5725da169b8e7ca520282. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f89a35ed-4972-400b-b43c-079e6e83d572.json and https://artists.proofprofile.net/proofs/artist/f89a35ed-4972-400b-b43c-079e6e83d572.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-21T18:08:38Z
  text: {"copyright_id":"0x6f283a05b91fb8acf3f26cd8d2691c097336bf9c58b5725da169b8e7ca520282","name":"Eugénie Lefebvre","registered_at":"2026-06-21T16:09:13Z","symbol":"NIM1969944","token_address":"0x6c655eb3ddaa870531cf51bb01915fd7a3d416a2","type":"artist","uuid":"f89a35ed-4972-400b-b43c-079e6e83d572"}
album: Ténèbres et Abysses: Leçons pour la Semaine Sainte
  type: MusicAlbum
  date published: 2023-03-10