thumb|An elaborate Celtic scabbard in two colours of bronze, thumb|A 1916 leather scabbard for a saddle lever-action rifle of Jack Peters, a ranch hand who worked on the Grant-Kohrs Ranch in Powell C
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 0x7937beea08da694da7ea9c971f25d3f2c77fa8943e337fa811b38cb3baf3bb33. 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/495b361d-4b72-42c4-8a99-33422c129f3f.json and https://artists.proofprofile.net/proofs/artist/495b361d-4b72-42c4-8a99-33422c129f3f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).