thumb|right|260px|Jan Harbeck in Aarhus Jan Harbeck (born 13 April 1975) is a Danish jazz musician (saxophones, flaute, clarinet) and composer. Biography Harbeck attended the Royal Academy of Musi
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 0xf7db906975889a7219876c3cddf89fc74d16ce23ebe0f0e552201e4f45aa20f8. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf7126c0-4072-48bd-b35f-b87a5257efdd.json and https://artists.proofprofile.net/proofs/artist/cf7126c0-4072-48bd-b35f-b87a5257efdd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).