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 0xcf84d4ea16d3b035e59f3d53fe6b2bc466ad8e7cb28066d72d929a9065de4c3d. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36b34390-63ca-4261-89ba-e21ee8f372b2.json and https://artists.proofprofile.net/proofs/artist/36b34390-63ca-4261-89ba-e21ee8f372b2.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Und zum Kaffee einen Mord [Kathi Wällmann Krimi, Band 1 (ungekürzt)]
Blut ist nicht dicker als Wasser [Kathi Wällmann Krimi, Band 2 (ungekürzt)]
Muscheln, Meer und Meuchelmord [Kathi Wällmann Krimi, Band 3 (ungekürzt)]
Bei Einzug Mord [Kathi Wällmann Krimi, Band 4 (ungekürzt)]
Tödliche Erholung [Kathi Wällmann Krimi, Band 5 (ungekürzt)]
Tödliche Bewegung [Kathi Wällmann Krimi, Band 6 (ungekürzt)]
Sommermord [Kathi Wällmann Krimi, Band 7 (ungekürzt)]
Nordseemord Der Tote am Deich [Steinbeisser und Fendt, Band 1, Steinbeisser und Fendt ermitteln (ungekürzt)]
Nordseemord - Die Tote im Möwennest [Steinbeisser und Fendt, Band 2, Ein Fall für Steinbeisser und Fendt (ungekürzt)]