300px|thumb Sir Robert Dallas, PC, SL KC (16 October 1756 – 25 December 1824) was an English judge, of a Scottish family. Life and career Robert Dallas was born at St Michael's, Cornhill, London. He
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 0xb3350c49c557d8d8c394b975b36d959e433e74062f29c4d444816ed01071ef31. Chain 2 (Bitcoin): anchored in block 954587 (2026-06-20T19:10:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bac05f51-3195-415e-9464-b3ab43483706.json and https://artists.proofprofile.net/proofs/artist/bac05f51-3195-415e-9464-b3ab43483706.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).