Lars Johan Lindtner, known as Lasse Lindtner (born March 7, 1955, in Bergen)"Lasse Lindtner", Store norske leksikonHåkonsen, Kent Stian. 2011. Anne Marie Ottersen og Lasse Lindtner i Den Gode Hensi
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 0x5dcf0c2d5b61d2a41d0d76141bd855506de1683b7c75866911912e12312e67cc. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3303922-7fa9-4234-b571-816a192d8fb2.json and https://artists.proofprofile.net/proofs/artist/c3303922-7fa9-4234-b571-816a192d8fb2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).