thumb|Lars Knutzon, 1990. Lars Knutzon (born 1 October 1941) is a Danish actor and director, best known to international audiences for his role as Bent Sejrø in the Danish TV drama Borgen."Borgen: It'
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 0x493cc8fe2a5f681757ad3ec209ffc230db00ddaccde3c9e0c64b3a60b3897c88. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d299a33d-ac94-47b2-9835-a3fb39b2a145.json and https://artists.proofprofile.net/proofs/artist/d299a33d-ac94-47b2-9835-a3fb39b2a145.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).