El Macho (also known as Macho Killers) is a 1977 Italian-Argentine Spaghetti Western film written and directed by Marcello Andrei and starring Carlos Monzón, George Hilton, Malisa Longo and Susana Gim
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 0x151d597d5e62ca89ae74f4a2b0241be2c6d47dae4993ac5237f06d804774e1ed. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3231eaf2-2b36-421d-9bad-9e298f27470a.json and https://artists.proofprofile.net/proofs/artist/3231eaf2-2b36-421d-9bad-9e298f27470a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).