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 0xe67be98fef4a3b1c359c6c9cf2318ad2f55ada049cbd105de2b8bcefaaea977d. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2529a9c-77a3-49aa-963b-7e1391676e2b.json and https://artists.proofprofile.net/proofs/artist/b2529a9c-77a3-49aa-963b-7e1391676e2b.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Frida Faultier und ihre große Abenteuerreise: Wunderschöne Gute-Nacht-Geschichten zum Einschlafen und Träumen für Kinder ab 3 Jahre. Ein Vorlesebuch mit 5-Minuten Geschichten zum Kuscheln
Kapitel 1 & Kapitel 2.1 - Frida Faultier und ihre große Abenteuerreise: Wunderschöne Gute-Nacht-Geschichten zum Einschlafen und Träumen für Kinder ab 3 Jahre. Ein Vorlesebuch mit 5-Minuten Geschichten zum Kuscheln
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 0xb6b3dc2daf7fede174e8f309663284002d69c60ae867a0e2b4b5693775a7beb9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEWI10457015 — a six-check JSON result.
Kapitel 2.2 - Frida Faultier und ihre große Abenteuerreise: Wunderschöne Gute-Nacht-Geschichten zum Einschlafen und Träumen für Kinder ab 3 Jahre. Ein Vorlesebuch mit 5-Minuten Geschichten zum Kuscheln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c6f7ec7219f718088602899ce5ccb7da0b1a98bcc2b72e3f15fbf405c477b6. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEWI10457016 — a six-check JSON result.
Kapitel 2.3 & Kapitel 3.1 - Frida Faultier und ihre große Abenteuerreise: Wunderschöne Gute-Nacht-Geschichten zum Einschlafen und Träumen für Kinder ab 3 Jahre. Ein Vorlesebuch mit 5-Minuten Geschichten zum Kuscheln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cf1e86bc0623fae19a90ebe3b93f8964ec2fc817664b5969e5cff796246cba. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DEWI10457017 — a six-check JSON result.
Kapitel 3.2 - Frida Faultier und ihre große Abenteuerreise: Wunderschöne Gute-Nacht-Geschichten zum Einschlafen und Träumen für Kinder ab 3 Jahre. Ein Vorlesebuch mit 5-Minuten Geschichten zum Kuscheln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216392b147ab785e5b49bed358912bcb056bd253ee7014286426ff2e4b709165. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/DEWI10457018 — a six-check JSON result.
Kapitel 3.3 & Kapitel 4.1 - Frida Faultier und ihre große Abenteuerreise: Wunderschöne Gute-Nacht-Geschichten zum Einschlafen und Träumen für Kinder ab 3 Jahre. Ein Vorlesebuch mit 5-Minuten Geschichten zum Kuscheln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c42e84bc742065a3817d40b8b8e4c5f79c17ca4d85c76dcaf37a56932f221e7. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/DEWI10457019 — a six-check JSON result.
Kapitel 4.2 - Frida Faultier und ihre große Abenteuerreise: Wunderschöne Gute-Nacht-Geschichten zum Einschlafen und Träumen für Kinder ab 3 Jahre. Ein Vorlesebuch mit 5-Minuten Geschichten zum Kuscheln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e54b6ad622cb58d1824233dad44a473591f51b7dce29bec0af1aa5696f4fcb. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEWI10457020 — a six-check JSON result.
Kapitel 4.3 & Kapitel 5.1 - Frida Faultier und ihre große Abenteuerreise: Wunderschöne Gute-Nacht-Geschichten zum Einschlafen und Träumen für Kinder ab 3 Jahre. Ein Vorlesebuch mit 5-Minuten Geschichten zum Kuscheln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5aa7592a1a6a758bbca225f0d4c6488a8d422f15d6e1276d95afc78480bac7. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEWI10457021 — a six-check JSON result.