Jean Lassalle (; ; born 3 May 1955) is a French politician who represented the 4th constituency of the Pyrénées-Atlantiques department in the National Assembly from 2002 to 2022. A former member of t
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610b529cf42d8d858e6f55cd1af303b9ecb1ee7f8abbdc782d4eb900b9546a88. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f749b64e-39b7-44f7-a256-fec226a6ebb0.json and https://artists.proofprofile.net/proofs/artist/f749b64e-39b7-44f7-a256-fec226a6ebb0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).