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 0xd62fa01f06b9a40aee57dc874f80e8a885d8650b52ab5f4be66f0b2e82ae2256. 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/fa73d1fd-c749-4d06-b3e8-e2456e2b4c6a.json and https://artists.proofprofile.net/proofs/artist/fa73d1fd-c749-4d06-b3e8-e2456e2b4c6a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bäjkån och Bällman SR:s Julkalender 1991