thumb|300px|Engraving of the eighth print of A Rake's Progress, depicting inmates at Bedlam Asylum, by William Hogarth Insanity, madness, lunacy, and craziness are behaviors caused by certain abnormal
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6dbb88fbc98c492edbedc9fb248020e359a36834745f9a12bf5c6d2918082e3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e1d7994-cad3-4257-b3e9-73fc05a2f12a.json and https://artists.proofprofile.net/proofs/artist/5e1d7994-cad3-4257-b3e9-73fc05a2f12a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).