thumb|Metro Bank, Borehamwood Vernon W. Hill II (born August 18, 1945) is an American businessman, the founder and former chairman of Metro Bank, a UK retail bank with 77 stores, and assets of £7.4b
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 0xa317adc654e32bf503a65c8d662c99f46fbda868438df8ac8512ceb47f9b4ae9. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a1231e4-4744-4270-b8eb-d3a7521a63bd.json and https://artists.proofprofile.net/proofs/artist/8a1231e4-4744-4270-b8eb-d3a7521a63bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).