thumb|right|Merchants in a Southern Port by Thomas Wyck A merchant is a person or company engaged in trade, conducting sales through stores or online platforms, particularly one that engages in inter
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 0x28ba084e4e8270c3a3861f662e18fb2b9b3f57b4a1196a310a4d3e2dc424a0da. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b8a4104-cadf-4a03-89d3-883348f482fe.json and https://artists.proofprofile.net/proofs/artist/4b8a4104-cadf-4a03-89d3-883348f482fe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).