thumb|The heraldic crown for Spanish barons Baron is a rank of nobility or title of honour, often hereditary, in various European countries, either current or historical. The female equivalent is bar
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 0x3d3f34486c57774afdd97da0617c4f9ef0ee213496713e0de8f5c0626e8f44a7. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33b2509d-45d3-4ce3-9151-cb08cdbcc2ae.json and https://artists.proofprofile.net/proofs/artist/33b2509d-45d3-4ce3-9151-cb08cdbcc2ae.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).