Tiresia is a 2003 French film directed by Bertrand Bonello and written by Bonello and Luca Fazzi. Based on the legend of Tiresias, it tells of a transgender woman who is kidnapped by a man and left to
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 0xc8eb0e81486381bd96737b77a29cee925c30d358688eafeb894caa6c010eaef6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58027eae-192f-45af-954f-00880d42e2b8.json and https://artists.proofprofile.net/proofs/artist/58027eae-192f-45af-954f-00880d42e2b8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).