thumb|Sir David Taylor Monteath Sir David Taylor Monteath (7 April 1887 – 27 September 1961) was a British civil servant, working at the India Office in London, who was the last Permanent Under Secr
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5805ea77a50a23237940162487273c0a37bafe68068624019cb0949489a6311. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5367287-bf70-449b-9093-98e3ce4961a4.json and https://artists.proofprofile.net/proofs/artist/f5367287-bf70-449b-9093-98e3ce4961a4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).