Hernán Segundo Castro Venegas (14 August 1961 – 17 August 2021) was a Chilean professional footballer who played as a left winger for clubs in Chile and Mexico. Career As a child, Castro was with Chi
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 0x9c5f612f22be78e4496ce79edc72ee194a9c2b3132612990cd58afe8c6a30e6a. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0502f3d-2859-4430-a2cc-140bdb03c50f.json and https://artists.proofprofile.net/proofs/artist/d0502f3d-2859-4430-a2cc-140bdb03c50f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).