thumb|upright 0.75 |A Celtic cross symbol The Celtic cross is a form of ringed cross, a Christian cross featuring a nimbus or ring, that emerged in Ireland and Britain in the Early Middle Ages.Herren
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 0xfec1f1820ad705b70ed44028fc17274b7deee25c7f429392e4d51075d7cdc163. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f23ceee-ffbd-4669-8643-07b0dc6bca21.json and https://artists.proofprofile.net/proofs/artist/0f23ceee-ffbd-4669-8643-07b0dc6bca21.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).