Betty Blue () is a 1986 French erotic psychological drama film written and directed by Jean-Jacques Beineix, based on the 1985 novel 37°2 le matin by Philippe Djian. The film stars Jean-Hugues Anglade
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 0x2d36514c1298e807e6c2b9d138356560b3b9e92e6f087853a362e37df0d001a7. 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/a1db0054-ee1a-43ed-be80-a995edd48246.json and https://artists.proofprofile.net/proofs/artist/a1db0054-ee1a-43ed-be80-a995edd48246.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).