thumb|right|Joulupukki and his wife. () is a Finnish Christmas figure. The name literally means or in Finnish; the word comes from the Old Swedish word bukker, a cognate of English "buck", meanin
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64c6e2556b64614ec276872253c734f51ac564c12cf2997b175a8ec88407abc. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8bf02492-1cea-4631-b253-127b29c5d005.json and https://artists.proofprofile.net/proofs/artist/8bf02492-1cea-4631-b253-127b29c5d005.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).