Killhope is a small settlement at the very highest end of Weardale in the civil parish of Stanhope, in County Durham, England. Killhope Pass, the road linking Killhope, County Durham to Nenthead, Cumb
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 0xb8f78dcd8af6c2308144ff935971be438ef1321050382cce9f4ffe3b70f9af09. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb1aed4b-0de5-4b14-aca5-878ca53250ac.json and https://artists.proofprofile.net/proofs/artist/eb1aed4b-0de5-4b14-aca5-878ca53250ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).