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 0xf4af561e3856ac0227fcf87d2b736b96d1ee09fc5ead0ab2458ddf7f4d5787e0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9dfc17e-7d24-4644-875c-b1f93cf89fb7.json and https://artists.proofprofile.net/proofs/artist/a9dfc17e-7d24-4644-875c-b1f93cf89fb7.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 0xb0f80eef8317d44ca239fe4f7fec6a8be762cf4b6a5bdc5e34a29234ffafbd48. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/FR10S2336202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa1102237913a7f49e0ee2d791ba123abce4326da31c8465b5da1b0d3aafd78. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:56:56Z), 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/FRX872367429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d5d39cbafb62b0603c6e36179027e4df4649e3cba8c94acbfd98037648d77c2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM3DF2281951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a488d07774ec1326010c23f908a24f76d3738248299cc3948d3a7e2d83d7eb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USANG2411394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1e95b2e31e62f2ced41b97f418cb92240dc15f164a468fc315f5906004e112. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USANG2481946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9bddb6891a81835370ec1d8713cdb683c1e6184ba8447e29a1a97165bd5dcdf. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:58:44Z), 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/US3DF2541069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d16dd29d4058d23f8289cdb5d9f01e8b8fde7aece8062a6bf37d29514427987. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/US3DF2533500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf5bebc87551b90e0ddd3ab60c17d733b8ddc0fda9fff2887e883137aabb5eb. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZVEM2562769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc0c78a3c1059a934ca758cc5b52b2275ecb073b120560b383cc25622760fa5. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:02:16Z), 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/AEA3A2571242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33dae4517c621db73c65d502464482ed1b8a404f22606ceb3df807f3a2e56877. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/AEA3A2581761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07db0b01d6380d83b731986500cf369bab9ca6b495db4b7235c2219de392eba. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DE1ET2399524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023c60b7e0d1776e84cf8167a24aad535cafc0153dbbb4c120517d15721db710. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/RUA1D2590550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf702f99b227a4785fafa4ab4fc1346d162b966f60d83f09ff3515e9a9e7a412. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX282584667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eea156a0c91789a8a9cde6485a1b5ee2e2250c7a9d88a0f1db1b6aee56b99b9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282584670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df081468375304b9c09572a999ff46811066482592c1b5ca3162081e45b20c9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRX282584701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6dd42e5df0038e00ce6094dbd3f138e659da448219560c06c393370e93e5a10. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282592105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf7f35d8c1339b3da09471bc37017a910f12feb19ecc6f22162f60ac63a6c6f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX282592338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ece1360190cbd902e088ea7fd93f40fd9cc04b2e1a31e0e2507bd98562bc07. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/FRX762595671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32a296c809eabaf4b55843d6546ed9c221b062dd58423c9f06b7917d237f73b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FRX762595672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa490f404b000c1fabb2e68a55427ec1da997c19f77c7af4f9338aa764ab57b03. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT5M42532584.