Herman Koch (; born 5 September 1953) is a Dutch writer and actor. He has written short stories, novels, and columns. His best-selling novel The Dinner (2009) has been translated into 21 languages. He
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 0x470b761441085e5133f98e61fdfcb020b5323eafb9054bb954728c34e020b69f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e52e4a8-11f7-4f82-b87a-a31f4f5c5c1b.json and https://artists.proofprofile.net/proofs/artist/5e52e4a8-11f7-4f82-b87a-a31f4f5c5c1b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sommerhaus mit Swimmingpool (Gekürzte Fassung)
Herman Koch und der vertrauensvolle Arzt [lit.COLOGNE live (ungekürzt)]