La Grande Illusion (French for "The Grand Illusion") is a 1937 French war drama film directed by Jean Renoir, who co-wrote the screenplay with Charles Spaak. The story concerns class relationships amo
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 0x9d82bbb805a5fbe534b33269a2d6589d967c78a6ad1a57fc40ee8acdc0b95892. Chain 2 (Bitcoin): anchored in block 953958 (2026-06-16T14:52:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27687980-5cb8-4fce-b459-66fd02f8818d.json and https://artists.proofprofile.net/proofs/artist/27687980-5cb8-4fce-b459-66fd02f8818d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).