Carlisle ( , ; from ) is a city located in the Cumberland district of Cumbria, England. It is the largest settlement and only city in Cumbria. In 2021, it had a population of 77,730. Carlisle's earl
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 0x0f3ec569745f4599bfdc06fba0137f8662016967c9cca57249529eb9c68b2cdd. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9636871a-600b-4cc6-a12a-16342b335465.json and https://artists.proofprofile.net/proofs/artist/9636871a-600b-4cc6-a12a-16342b335465.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).