thumb|right|Que valor! – a sketch of Agustina de Aragón by Goya. She manned a cannon alone in a siege of Saragossa and her bravery rallied the defenders. thumb|God Speed (1900) by Edmund Leighton
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 0x061ecb8dcdebef9bb547851928169c63e201c68297d43473e99d5be991cde9f1. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e8ca37f-a544-42d6-a963-3bc1d65b7b28.json and https://artists.proofprofile.net/proofs/artist/1e8ca37f-a544-42d6-a963-3bc1d65b7b28.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).