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 0x3fe2d5f6e8fa237d7a9097db303ff989c575f3f189e34b0479a6c99fca4fcbd9. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e310ffad-0daa-4dd7-af38-65723a3109ba.json and https://artists.proofprofile.net/proofs/artist/e310ffad-0daa-4dd7-af38-65723a3109ba.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x638fb51f60070c71938e2b09ae99dad1e13fa0558d6d6f2a518c5a848eb302e5. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/DEGA41800002.
Gospel Faces (Thilo Wolf & Band Meet Joan Faulkner)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f5d6e20e07843bf0bed99f38696f860781551214f8181efb75329eb08b6feb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEZ369692703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7837fd2ae3595d6b5483af8a8236ef7dc730d1742fa7a659c34979065660e575. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE280336306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155a4ec485e1340e84f891bbe85290616e74ba39de9167776314100477c56107. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HKI191522501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5f34517547b6e9f25efcb1d04777389daa0ff97e2e5f5e7c0f33b5161d0495. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKI191522502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd424a069c133ff756d25845b601e2b93ac31ca24e439ca91222d217f7463437c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI191522503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceaa2485c4692ee208f8a140b7c5135ce2508494636866941106ef2281d26a56. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/HKI191522504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c54462d1e5e9647ad639ca753f2a6a068736a22dcf2d9d0dbbc5d428bd9d7e. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191522507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd44e1480407b791c6b59c59f32b2ed23913ca8297c05e06b2635610917e9d7. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191522509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddd851e10bb55a4f9a5e7d9511b6416ac6369d7a1b063736a79f793c6ef730b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKI191522511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc39553e4255d5d2fa7fca8b59aea2cb88854ba7d370c51d304a1db23171d075. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI191522512.
Bach - Därr - Franck - Vierne: Die Blümelein, sie schlafen - Klänge eines Traumes
Die Blümelein, sie schlafen - Klänge eines Traumes: Foglio d' Album
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7213a64077f9d760505369ced3f62cdc7d07e9e82ee2924c1203f36f6b96f52. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DEYX82107358.
Variationen für Orgel Solo über "Die Blümelein, sie schlafen": No. 2, Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb6c1a83c29f17a9a4df79111d37c2b79a09b5a1cd3fa63f8b73e5e1575f3d8. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEYX82107202.
Variationen für Orgel Solo über "Die Blümelein, sie schlafen": No. 4, Tanz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b2b80124d7e03360e98b2081be14557e35c306d7a50eabb860333cbb0abce5. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEYX82107190.
Variationen für Orgel Solo über "Die Blümelein, sie schlafen": No. 7, Rezitativ und Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49c84c431d9cc84f6d81fdbb6a674c5725979d7113d7776c125df4660343b02. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEYX82107278.