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 0x3b559dc3ea71ee2fc4c52eb490147e11eb4c375674c508ce146e9c45ea0c636b. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2c1eb86-113b-4469-9d94-05f4afc910d0.json and https://artists.proofprofile.net/proofs/artist/b2c1eb86-113b-4469-9d94-05f4afc910d0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Herz und Mund und Tat und Leben, BWV 147, No. 10 Chorale: Jesus bleibet meine Freude
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 0x428f6ad14bd984a8951c8d12205e4058e109cb50b3df1f718e4da18281dc7b10. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC472020404.
Zipoli: Sonate d'Involatura per Organo e Cimbalo, Op. 1: No. 11 Canzona in G Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eab7be00c8e5be9f72cb2e9e9f291241bad9b27f8c2aba7f6288dde4c17dee9. 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/ITC472020405.
Zipoli: Sonate d'Involatura per Organo e Cimbalo, Op. 1: No. 14 All'elevazione in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b40d36d6c2f5c10a0f0b9d8d06abdca9964d76e68f46d8552c837fd4fa1758. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITC472020406.
Zipoli: Sonate d'Involatura per Organo e Cimbalo, Op. 1: No. 15 All’offertorio in C Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f861879887c0cab5059caa03f4d6d2a2aa93997ccd5169d279dd62c07a2228. 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/ITC472020407.
Bach: Ich Ruf' Zudir, Herr Jesu Christ, BWV 639 (Corale form Orgel-Büchlein, No. 41)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x482bed6b015c840ed27db42098fe380bbfa2a70bfdd5b9b79dfca5c44b30727f. 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/ITC472020408.
Bach: In Dich Hab' Ich Geboffet, Herr, BWV 640 (Corale form Orgel-Büchlein, No. 42)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b646ac05f31da8bd36c088e68b13b567ed98abe942fc2fd4e2102dfd9e64ac9. 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/ITC472020409.
Bach: Wenn wir in höchsten Nöthen sein, BWV 641 (Corale form Orgel-Büchlein, No. 43)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fe7ad9ad2a745d4ba883cf3328a60cdaff187fcf8bc1ca0de356daecba5aff. 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/ITC472020410.
Bach: Toccata e fuga in Re minore, BWV 565
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38545e8e7d00196ebe5c91cc666d06294bde3f02b837fb315009ff044794213. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ITC472020411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913827eb106d336dff697adb49d3caefa3fd333bfdc6288efb4051c0fa3c8f35. 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/ITC472020412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3beed6f5fde9f3b7d3b9fb6201245ab57952253b727462bd50d899fc39bdf23b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITC472020413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08397f9bc9d5cee2a43daeda3787f658dd8258c844806ca7f35be22b32e914e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC472020414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7836a7f2579eeec024f621ee2624de6c46baabe0e09b9c47855d72570ebd3995. 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/ITC472020416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876d3d3b1afef50630a67d26922ee447f8578ee2169583a523e51438aeac0083. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITC472020418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3779eaee30613392034dae1a526f55c63ac2aff72217ed826a88dba070ce2244. 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/ITC472020420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x703dfda5a24c57eea68c91b9d5dee91729a7532474a5405f1a445593010ae828. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITC472020426.