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 0x2964aef0a3b9832103f608ecd121150251fed9b06e5b337950d62a38a204e564. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8efe124-e7cc-425e-b678-91b093a6da36.json and https://artists.proofprofile.net/proofs/artist/c8efe124-e7cc-425e-b678-91b093a6da36.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mädchenschuld: Küstenkrimi [Ana Ortega ermittelt, Band 1 (ungekürzt)]
Kapitel 1 - Mädchenschuld: Küstenkrimi - Ana Ortega ermittelt, Band 1
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd60db7737694a55823a53b533e531ed930712747affd6501406f1b8a106dc25. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-20T00:21:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEUE22587103.
Dunkelsteig (Bd. 1) [Band 1 - Dunkelsteig-Trilogie]
Dunkelsteig - Schuld (Bd. 2) [Band 2 - Dunkelsteig-Trilogie]
Dunkelsteig - Böse (Bd. 3) [Band 3 - Dunkelsteig-Trilogie]
Gretchen Larssen und das Ostseemädchen [Ein Fall für Gretchen Larssen, Band 1 (ungekürzt)]
Gretchen Larssen und das Dünenopfer [Ein Fall für Gretchen Larssen, Band 2 (ungekürzt)]
Gretchen Larssen und der Ostseezorn [Ein Fall für Gretchen Larssen, Band 3 (ungekürzt)]
Gretchen Larssen und der Küstenmörder [Ein Fall für Gretchen Larssen, Band 5 (ungekürzt)]
Gretchen Larssen und der Ostseemord [Ein Fall für Gretchen Larssen, Band 6 (ungekürzt)]
Gretchen Larssen und die Ostseetränen [Ein Fall für Gretchen Larssen, Band 7 (ungekürzt)]