Rachida is a 2002 Algerian drama film directed by Yamina Bachir. It was screened in the Un Certain Regard section at the 2002 Cannes Film Festival. The film was also the first 35mm full-length feature
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 0x8a13e0c4ac86194585b932c113ce52e6195f30297c1bdffad45e960de16064a5. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c0ce175-181f-4bbc-b0bb-a445abf9cfb1.json and https://artists.proofprofile.net/proofs/artist/3c0ce175-181f-4bbc-b0bb-a445abf9cfb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).