Guillermo Rivera may refer to: Guillermo Rivera Aránguiz (born 1989), Chilean tennis player Guillermo Rivera Bustos (1920–1992), Chilean politician and businessman , (1868–1928), Chilean politician,
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 0x27e0b7a2510b042e15a33ebc8f968f06078847c3203a364bda454b71ea6eff0f. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/920f79ea-c163-4518-9638-3a8c318186f5.json and https://artists.proofprofile.net/proofs/artist/920f79ea-c163-4518-9638-3a8c318186f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).