Para Elisa (which translates into For Elisa) is a 2013 thriller film directed and written by Juanra Fernández. The film stars Ona Casamiquela as a college student that accepts a job from a wealthy for
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 0x092fcefd4cbeb792677222048b78e10affbaa186eba7913746c381ced1596dbc. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d66d29e-387c-49b2-bff0-3f519dc76c6b.json and https://artists.proofprofile.net/proofs/artist/8d66d29e-387c-49b2-bff0-3f519dc76c6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).