Jean-claude Dreyfus
type: MusicGroup
description: Jean-Claude Dreyfus (born 18 February 1946, in Paris) is a French actor, comedian, and author. He began his acting career in 1974 in the film Comment réussir quand on est con et pleurnichard. Dreyfus
popularity: 2
followers: 112
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x985b0bed9b6ae3ab99aa706159c2936c6c3c38de5b7ba5fa49a1327dd7ffe5e8
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/a5eaf160-90c8-4096-b407-32579827c12d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a5eaf160-90c8-4096-b407-32579827c12d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a5eaf160-90c8-4096-b407-32579827c12d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T08:57:02Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x985b0bed9b6ae3ab99aa706159c2936c6c3c38de5b7ba5fa49a1327dd7ffe5e8","name":"Jean-claude Dreyfus","registered_at":"2026-06-20T07:28:34Z","symbol":"NIM1554039","token_address":"0xa72e3a0b9572395bde2f00395bb2575e571469c7","type":"artist","uuid":"a5eaf160-90c8-4096-b407-32579827c12d"}
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 0x985b0bed9b6ae3ab99aa706159c2936c6c3c38de5b7ba5fa49a1327dd7ffe5e8. 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/a5eaf160-90c8-4096-b407-32579827c12d.json and https://artists.proofprofile.net/proofs/artist/a5eaf160-90c8-4096-b407-32579827c12d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T08:57:02Z
  text: {"copyright_id":"0x985b0bed9b6ae3ab99aa706159c2936c6c3c38de5b7ba5fa49a1327dd7ffe5e8","name":"Jean-claude Dreyfus","registered_at":"2026-06-20T07:28:34Z","symbol":"NIM1554039","token_address":"0xa72e3a0b9572395bde2f00395bb2575e571469c7","type":"artist","uuid":"a5eaf160-90c8-4096-b407-32579827c12d"}
album: Honoré de Balzac : César Birotteau
  type: MusicAlbum
  date published: 2013-10-18