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 0x9b4183b653459c4da1c7dd50ecb759906f6585a0b901515acb75e31297ddfbfa. 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/2870605e-a20c-4c89-99e8-bf8eafac8bbd.json and https://artists.proofprofile.net/proofs/artist/2870605e-a20c-4c89-99e8-bf8eafac8bbd.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Die Gloriosa-Verschwörung [Historiker Wiesenburg auf tödlicher Spurensuche, Fall 1 (Ungekürzt)]
Die Gloriosa-Verschwörung (Historiker Wiesenburg auf tödlicher Spurensuche, Fall 1)
Jägerstein (Historiker Wiesenburg auf tödlicher Spurensuche, Fall 2)
Jägerstein [Historiker Wiesenburg auf tödlicher Spurensuche, Fall 2 (Ungekürzt)]
Verloren Wasser. Das Schattenkommando (ungekürzt)
Das Elisabeth-Rätsel - Historiker Wiesenburg auf tödlicher Spurensuche [Jonas Wiesenburg, Fall 3 (Ungekürzt)]
Das Elisabeth-Rätsel (Historiker Wiesenburg auf tödlicher Spurensuche, Fall 3)