José María Pérez García (born 25 February 2001), commonly known as Farru, is a Spanish footballer who plays as a central defender for Primera Federación club Unionistas. Club career Born in Lorca, Re
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 0xd71dade43dda91116702190193a903913c9b047c18a29c69d869e792e65496a2. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4469720-7012-45e9-8298-5320e7f2a4ed.json and https://artists.proofprofile.net/proofs/artist/f4469720-7012-45e9-8298-5320e7f2a4ed.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).