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 0x4c330b0886731527066eec6b2e13f5bebb193d136ee4e5759985db74fc9bfb57. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70ef4665-1e51-426d-9975-c8f409280e76.json and https://artists.proofprofile.net/proofs/artist/70ef4665-1e51-426d-9975-c8f409280e76.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 0x7d32f2a9ddf85089382a33901da7a1c3436d1212aedd5f03a6a540aa845b9ea9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USEAX1502750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68805906041c7a00e34b78b92ca625d9d5d1cb88d9b695cfd0d6edab622ad42. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USEAX1502751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0099b8525a449407bd2ea6e00d9c4baadc1685f840ee9a1abf28a4eb13684ffc. Chain 2 (Bitcoin): anchored in block 957965 (2026-07-14T07:07:52Z), 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/USEAX1502752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ca8c46bf2599d418c2c8c2a1b826f02ae86ec37920ec7eb4cab871c25c491a. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USEAX1502753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8b5ea0f579e76cbed871895179bcc853cbe11916850b81555445ed1a996c26. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USEAX1502755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac03188dfa387564fa2eee8ed0d67bb97b39cc3cda319a240401347349e2c0c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USEAX1502756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x024677a9faa02e0e53ebd7cd8a2115d681b172eacb20b94fb5ec9a01c5e622a2. 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/USEAX1502757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29d9688ca68792b18c94c7bb93571225bce618697b3b85f9de35be1a74dd79b. 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/USEAX1502758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041d7df3d16d3eeea05a1132c03d70cc135fa18291f77a6f70640e99c06b78be. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/USEAX1502759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfcfccf4dadb7844084985510101aedcd11c2c7f59d14358592dee3a6fdb782. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/USEAX1502760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5329882c84b2848cc6c80c795379aba73c1fcb756732b28f9fa7bc45db76bc38. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USEAX1502763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d18074de52361c2c57c485ab4f8dea63858b282dcaca9261df4fcf34a0112a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USEAX1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123b9b944f220ba646f340b2588984497ada576dd6be048a86086b1f3a707930. 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/USEAX1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1667e8658ccd5861e9cc7c7ddfbb4b56105d01f1c7f4804d25b113d512f4dd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USEAX1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95f7c006fd2843cd6ac6d8cc8639db3a08a31e8977925265957dcb8ca19fadb. 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/USEAX1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5b8dae0c988c6fdbf5c956688c2da7cc235a452c9f7065cf929caa551c57d1. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/USEAX1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796da2732b424caa407559dc4a32446b052d2b10a1c56f07209ba92bb981b101. 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/USEAX1800025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcadb46f32f4000f22988998fbf427da24a59d9ceb9667786dd8fcc22a76f53d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USEAX1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d9423084227d3704ecdda6597167c9ec1d318ab24886a9bdd18a84bae2b702. 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/USEAX1800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dff088d7877957577acf5c88e21123b6f75c6332e59d9e034e99a6b6f7da3c1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USEAX1900198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x171d86332ebe985336783467738d9fa813d154c2fb24eea29e948eefa0deb4a3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEAX1900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5669e4f7f99e082cff7228a048380aab45d89b72502622f8432d6214592b8ddf. 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/USEAX1900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917a73f6a15c3dda0dd2ff9356b37470098539147139df4bd95bb43cb7014bbb. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/USEAX1900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe064fdbb3c4686a51b6d9e75e4c2431c2536d289e392c050ff32128573089887. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USEAX2000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb199b894c3a6c4dde6f1b41fd41d56666d70f90c4911ee536e9c346574b75e7a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USEAX2000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8be7116a512a847384db31abb198ebd5c9fa5d6c2a41586c110479902cf3f5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USEAX2000086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70554c137da471010a7a821bd627afa9179a91c5047d2f38336efe5599d9c66. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USEAX2000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3b71add99f502a3a169d32e8d9461482776eeb4b7d5eb40d25e4979fb6649f. 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/USEAX2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7950f20a7def961e85cf26c0e5c1493cd129356eb3819c1ac8ae91b44f8425fc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEAX2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad471016e76ab429f8d447743ea1b5d0595969443b6eaa164a2524ccabb716fc. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USEAX2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63687e6f5dde3d9db961f0620c63c4fa69c8929e9bcccaf0781b26d232527a3c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USEAX2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ebd1e641e7f077072c11fa3d1136aee08f6cbfdad03ae8ea9a47920e3559fe. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEAX2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc763e90e787250d7811c27cc2ddfe04ab9c1be0588273f4fef3c625eb83f0c5. 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/USEAX1603072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f2cd4adea4acbe6d0d4cdc9edf3eb2a934de09d1d3f19002e9940eb01281bd. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USEAX1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd048f51d04b62e37cf1249d20b29851e2cf185e576615971cb4472c7b943dfe6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USEAX1502761.