Francisco Gómez de Quevedo y Santibáñez Villegas, Knight of the Order of Santiago (; 14 September 1580 – 8 September 1645), was a Spanish nobleman, politician and writer of the Baroque era. Along with
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 0x7ca10176ff8ad8de467aa77d1c7d93e31fba68d0e045d4e878ca87cdd405764b. Chain 2 (Bitcoin): anchored in block 954593 (2026-06-20T19:46:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd6dc7e6-0046-40b7-939f-60abb2fae97a.json and https://artists.proofprofile.net/proofs/artist/bd6dc7e6-0046-40b7-939f-60abb2fae97a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).