Leonard Lansink (born 7 January 1956) is a German actor. He appeared in more than one hundred films since 1983. Selected filmography +Film Year Title Role Notes 1987Hollywood-Monster Karl 1996Killer
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 0x4a980b3b2290b5594e8961c037f10ef8bacbc49300d7dcec1dce8bccfb59fddc. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2637ed1-4dd9-474d-83cf-48114075cce1.json and https://artists.proofprofile.net/proofs/artist/d2637ed1-4dd9-474d-83cf-48114075cce1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).