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 0x9bf64f5492cedff2301c69d68511525f0576b220fdc250270f532f557210cc72. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7600ab3-32fd-4ed5-a610-960b126a81fa.json and https://artists.proofprofile.net/proofs/artist/a7600ab3-32fd-4ed5-a610-960b126a81fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
So blutig die Nacht [Kate-Marshall-Reihe, Teil 1 (Ungekürzt)]
So eiskalt der Tod [Kate-Marshall-Reihe, Teil 2 (Ungekürzt)]
Seelendunkel [Kate-Marshall-Reihe, Teil 3 (Ungekürzt)]