Carlos Salas Pérez (born 10 October 1955) is a Cuban former volleyball player who competed in the 1976 and 1980 Summer Olympics. In 1976, Salas was part of the Cuban team that won the bronze medal in
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 0xd7c813ba4af8a6a68d081065dda494d9d29440355f804b80ca7094ee7a36480c. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4974113-1f71-4e05-b5ec-8f0ab129cabe.json and https://artists.proofprofile.net/proofs/artist/a4974113-1f71-4e05-b5ec-8f0ab129cabe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).