Michel Gérard Joseph Colucci (, ; 28 October 1944 – 19 June 1986), better known under his stage name Coluche (), was a French stand-up comedian, film actor, activist and philanthropist. He adopted Col
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7638a0e92f90fe3dc6710dbcd26c05cd1223df7861c3d55ad8308ff283089286. 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/f842258d-50e7-4b56-91b1-33ba47d4ba49.json and https://artists.proofprofile.net/proofs/artist/f842258d-50e7-4b56-91b1-33ba47d4ba49.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).