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 0xcb94b06c121aaccf02fd7b1fb786b75493cce0f3231aee60ff1ba881b727f7d9. 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/b9aa96ca-f21c-43f9-8c50-86e48f9b00a9.json and https://artists.proofprofile.net/proofs/artist/b9aa96ca-f21c-43f9-8c50-86e48f9b00a9.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Stories About Horses. Pferdegeschichten (Englisch Lernen Mit Den Leselöwen - Spitzt Die Ohren)
Ritterfest und Drachentanz (Lieder und Geschichten von Rittern, Drachen und Seeungeheuern)
Lied: Drachentanz I - Ritterfest und Drachentanz
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 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 0x3f0cb18f9432d8912607782f2e92b8b5c550591851a8fbbf10da64781dd7292e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ92109313 — a six-check JSON result.
Gespensternacht und Monsterspuk (Lieder und Geschichten für Geisterstunden und Gänsehaut)
Treffpunkt Tatort: Der Einzelgänger [Band 1]
Treffpunkt Tatort: Sklaven und Herren [Band 2]
Treffpunkt Tatort: Die Schlange [Band 4]
Die Nordseedetektive. Das geheimnisvolle Haus am Deich [Band 1]
Kapitel 1 & Kapitel 2 & Kapitel 3.1 - Die Nordseedetektive. Das geheimnisvolle Haus am Deich [Band 1]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5b954aae33dae50875c37c3ee54aafb92a95a76b9eb11dd243eeb5ad8674c0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEVP81352635 — a six-check JSON result.
Kapitel 3.2 & Kapitel 4.1 - Die Nordseedetektive. Das geheimnisvolle Haus am Deich [Band 1]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e9d37aad94523a58e6dc975f432764525e136f2ef5441de643d3e73b7170a5b. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEVP81352636 — a six-check JSON result.
Kapitel 6.2 - Die Nordseedetektive. Das geheimnisvolle Haus am Deich [Band 1]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66daa57d86addcb0d17bea3de113f0f68faa44edf8fc62b273511786b14165d3. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEVP81352639 — a six-check JSON result.
Die Nordseedetektive. Das rätselhafte Wal-Skelett [Band 3]
Piratenschiffe, Piratenschätze (Lieder und Geschichten rund um Schatzkarten und Meeresungeheuer)
Die Nordseedetektive. Der versunkene Piratenschatz [Band 5]
Mord am Deich. Gesamtausgabe (Kurz-Krimis)
Das Jahrestreffen der glücklichen Witwen
Die Nordseedetektive. Die Entführung [Band 7]
Die Nordseedetektive. Das Geheimnis der gestohlenen Gemälde [Band 8]
Die Nordseedetektive. Filmreife Falle [Band 9]
Die Wunderzwillinge. Das ganz große Ding [Band 2]
Die Wunderzwillinge. Der unheimliche Mieter [Band 1]
Die Nordseedetektive. Gefährliche Spur [Band 10]
Leben und Schreiben in Ostfriesland. Die Kolumnen
Die Wunderzwillinge. Fiese Falle [Band 3]
Nachtblauer Tod [Leon und Johanna, Band 1 (ungekürzt)]
Der Weihnachtsmannkiller [Band 1 (ungekürzt)]
Echt jetzt? Felix und das wahre Leben (Ungekürzte Lesung)
Ganz ehrlich? Felix und das wahre Leben [Felix und das wahre Leben, Band 2 (Ungekürzte Lesung)]