Rafael Herrera (born 7 January 1945) is a Mexican former professional boxer. He won the Undisputed Bantamweight Championship in 1972 and was a two-time WBC bantamweight champion. Professional career
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55932a8170163f7825b1dc44a11fc136e602f7f7efebcf7e94a6417d25bb4384. 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/5dd6a070-c9fb-47a7-a329-9c2ffb6e03bd.json and https://artists.proofprofile.net/proofs/artist/5dd6a070-c9fb-47a7-a329-9c2ffb6e03bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).