Thomas Bidegain is a French screenwriter, producer and film director. He is noted for his collaborations with the director Jacques Audiard. He received the César Award for Best Original Screenplay in
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 0x419e3991a22cfbf791c5eb8e91b7a8f4ad5a192bc13894caf7f011c9ad369683. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45901f62-954a-4e91-b493-4c28ad468a75.json and https://artists.proofprofile.net/proofs/artist/45901f62-954a-4e91-b493-4c28ad468a75.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.