Chester is a cathedral city in Cheshire, England, on the River Dee, close to the England–Wales border. It had a built-up area population of 92,760 in 2021, it is the most populous settlement in the bo
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 0xa0453ae002b74578ada21d255a8e8edb0406cd8b9796d9f73248bac6e30f4bf3. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ed9c21c-b1e7-43c4-9982-f2d7647d22fb.json and https://artists.proofprofile.net/proofs/artist/3ed9c21c-b1e7-43c4-9982-f2d7647d22fb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).