Endless Horizons (French: Horizons sans fin) is a 1953 French drama film directed by Jean Dréville and starring Giselle Pascal, Jean Chevrier and René Blancard. It was entered into the 1953 Cannes Fil
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 0xd4e82ed5917539b88c0eb141de9747c066d909c729420b43f7c9b16cd577b768. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35ea1883-c882-460a-862d-5ee8aab3bc01.json and https://artists.proofprofile.net/proofs/artist/35ea1883-c882-460a-862d-5ee8aab3bc01.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).