Sergio Souto Vidal (born Oviedo, 4 November 1976) is a Spanish rugby union player. He plays as a lock. His twin brother Carlos Souto was also a Spanish international. Career His first international m
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 0x94b02f1eb8c63990f0fd23ca3d063b873b637207e1e31fb697592b19cccb9628. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b0cabe7c-9f2b-4cc2-a81b-26a10cafaa79.json and https://artists.proofprofile.net/proofs/artist/b0cabe7c-9f2b-4cc2-a81b-26a10cafaa79.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).