Juan Antonio Pino Pérez (born 3 July 1965) is a former professional tennis player from Cuba. Biography Pino, who comes from Pinar del Río in western Cuba, began playing tennis at the age of 10 and tr
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 0x1ffc5b103f7175ad1e821c87194948bb331e87c6df69d00ff27504e4b1ef467f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8aafbe9f-90de-4624-a478-e261dba72154.json and https://artists.proofprofile.net/proofs/artist/8aafbe9f-90de-4624-a478-e261dba72154.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).