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 0xddd373d04d6619667b1323f7df224d9f6522282b5ed8f6f1055b5a477e22326f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e72b4e69-c83d-45ac-afac-c2ff6a1daa40.json and https://artists.proofprofile.net/proofs/artist/e72b4e69-c83d-45ac-afac-c2ff6a1daa40.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0f45e383cd6071c9f4010cd48322d68a1a35a9b42aad1b844b520313f1c08f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA81817103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3377a66391fdb2f2d60d15bac60ddc417c521fccf725c10641c185393167ea23. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:23:56Z), 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/QZNWV2089069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64213bcfc9b42fd28cab86a5f1185fe29f4223c4c2df80d8d1b687330ca016ab. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZPLR2093819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d63e26a53fad0d95721ed9a90f2749a44c5a94123d43fcb8951c4ad83ea4f9. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:01:31Z), 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/QZPLR2093826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1afe9e6ff2647666088898cd4f7aaffa2ced209862b4418588a0e04a015abfa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRX452160295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7494c4e37abac3423e192f351c94f6f918614a1250ea96f4e242ad8855f73e. 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/FRX452279174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e882183663c2090eff11932d951e43308271671a4e2d8227c7f9d6c54a943a6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:16:16Z), 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/FRX452279195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e864f32707328a1585a6f42d41f40131e10d5853dc481a4bc96b76e1a144c8. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRX452279175.
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 0xcd4ef31be78a9f2843dabae40a619feab4d662902a2a701958bf2428bfa228a7. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FRX452279177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900f4772a1a4bd80c8123388f389e533121dac7d018df169443edecfbb115ed3. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FRX452279180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7873419f942c097fbf346363e08b631785999b981cc3d759c0b4dd5cdd22d0d4. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX452279182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281a0f9615706a31b02a2c13e4a61485d03f3c0718acbd8710ceea598845597c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX452279185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9177a58bedf9d68e303677975dfa17169a72e32f22d1464478056976d37610e8. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/FRX452279196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fa70babbdb5605acd19bb375961c62ba3151f40cfbcb366553d0cb94d52fe2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FRX452279198.
Lost Files (Mixed & Mastered By Andrés Manzanilla)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf258e61a2e2d89ed7197eabe37db9cb6345f93e1cea1dc93841b53938219f4d3. 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/QZGLS2391608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5685331c58ac3893c7847cbdd31b7aa521b1ceada490d3151932508df3976c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZK6J2021373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b86dd05bb65047332ca3238709dea1108bc092ffdc0baacdfe160308e4c2a67. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QZK6J2022649.