thumb|right|Portrait of a Young Fidalgo; a 16th-century rendition of a young Portuguese nobleman. Fidalgo (, ), from Galician and Portuguese —equivalent to a nobleman, but sometimes literally transl
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 0xd077aa36f366f25cadda94cc2d422fbb67f8dc1f72226f82a0c5eb5909c9986e. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9cc6c52-603e-443e-9c92-083e15006536.json and https://artists.proofprofile.net/proofs/artist/c9cc6c52-603e-443e-9c92-083e15006536.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).