Óscar Pezoa (2 May 1933 – 8 June 2023) was an Argentine cyclist. He competed in the 4,000 metres team pursuit event at the 1952 Summer Olympics. Pezoa died in San Francisco, Córdoba on 8 June 2023, a
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 0x2888e91c58cb7360f8d8858b1fb0c82365188a6f3125f74111167d0fa2a9bc27. 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/631f79b5-5b5e-4e03-b91f-2b675884a0ea.json and https://artists.proofprofile.net/proofs/artist/631f79b5-5b5e-4e03-b91f-2b675884a0ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).