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 0x8a7d0bb439f561c0c647d1fa735da3a80b5a7dae86ce69c8f6542138eb03f59d. 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/df277e94-f8b5-452a-bdd7-0d25da867a84.json and https://artists.proofprofile.net/proofs/artist/df277e94-f8b5-452a-bdd7-0d25da867a84.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 0xe27660eeddb1f5ee6b0c24bd05cdee72fc5edd0ac131ff5fd8eb2be22a81d772. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/US23A1512363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3e31b2ce973089ec0d274787f62fbe37fd3c9b3123823174a2190d2e294448. 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/US23A1528412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1b43352d480b95470eedffa4fa67e10ac54dea5d52696bb96363e4be188a7a. 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/US23A1528922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3869aec39082f9ed8b086e450ac199eee1fa53aa9a53b78c72487ee660069d02. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/US23A1529105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d6d7695af0b787449e503213cb6059d8e2433fade8c5e5e58bcd0636a06e9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:11:10Z), 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/US23A1533013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f70c14881102c118e16bb003b81d29059b09f376e14baae8abb079c71b230b4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/US23A1533992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d61f0181f09158796f281a6fb8fda72af22d35c9992cfa84a6a8e7cc36995b5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:00:29Z), 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/US23A1533993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb369548ce22e9c7440b58674392c2f40a98f54111ff13b94a612b0744240236. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:52:16Z), 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/US23A1533994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d6d7695af0b787449e503213cb6059d8e2433fade8c5e5e58bcd0636a06e9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US23A1533013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b442213a097ca4d6727a76c03a82f78b463984d8d4c4eaa06dccb2693cb087. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US23A1529143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7eb7ea3a23021d237fe96cbcc698ed214aab5fb27a755af3377b345b6c1ac12. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US23A1515319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4571ea0700ce4f09c416ad962e76cfd1e5dd1163980e413a1c47d9b60d672576. 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/US23A1512505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571b7c80cad88a8325fd698ae363202c2a750ddad9b0f205d636344972c04c9b. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/US23A1528806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de6f3bfdeb2fbfe2dd8b6db4c440900ff4fb4a6189a6d1f2f70aad31a43239e. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US23A1528421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c382253b84736217fdca9b4be856ceee3a9225382f7d97965baeaf408941ae5. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:31:54Z), 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/US23A1528230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bb800e5302f591dbfe9cc858e58f38564770eb6da2d123541217e9175b2f4cd. Chain 2 (Bitcoin): anchored in block 958911 (2026-07-20T19:24:51Z), 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/US23A1526057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02f8902fb82729ef2dea24ca3521b1a543589f6a4fb97f4f8da49f4c8f526a2. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US23A1526016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff67b1b0df17d288ffec156308fd86e9ea496a6c222a4cb91fdb68cf1fb27ecb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/US23A1512805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ed08e0ce8aa7572125b9d3d4aab18879c7b408440c7706d1b7877a0a305260. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/US23A1512474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7af303c5bfa441728b2452fccf55d5c94ac4c9d58d7d740e71dec3c489699c. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:01:50Z), 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/US23A1534982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f11fac29b858f85b8e582cbfefee1afefb428e9be02e0ccc9b0386e226d198. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US23A1536480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835518b57af2ca566f1a92d4805b2fc6f265625ee3275faa2d33bb6e2973854e. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:36Z), 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/US23A1537029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd916e843dc530a036c469dacfcf21600de22628951799a268a1c562cf8891764. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US23A1539254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a418e0e1aa8c1b8178a262d060d2fe873dd91637242dfabc939f1955d7c3b58. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US23A1539260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37823acc991d47efdb278b6b2c0ffc5e69166fddd682c0267869d8649ace71a. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:06:46Z), 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/US23A1544677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42d709ca3427dd6bb17c69e35be05581459636079b71567c613a5ab27e97ed7. 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/US23A1544728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9da119a4709ddb63702b24f85ee6ae8730eb0b4222d43235ac30d6bb217a3a. 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/US23A1542982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7af303c5bfa441728b2452fccf55d5c94ac4c9d58d7d740e71dec3c489699c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/US23A1534982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0b7d32904b6ad756050f21a27c424cceb5365f0137d04a25dca6365edd1af3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:21Z), 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/US23A1540160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x835518b57af2ca566f1a92d4805b2fc6f265625ee3275faa2d33bb6e2973854e. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/US23A1537029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe6277086d68226e59e1e61bedd460fa63059f60fe56a59ed2153114d4f5e42. 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/US23A1536764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33f11fac29b858f85b8e582cbfefee1afefb428e9be02e0ccc9b0386e226d198. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/US23A1536480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b21d373cf8dc272f2d8fbef4c7c5725e7cd1c888262915b962afe1d41472b4e. 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/US23A1536256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb441adfecb007eaab61ba97f6215c8f3ba7026474c0711d4102fbc8197a4574. 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/US23A1536165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebc9f37d41a20565d1d9fa9133a12ddc898893ba8bf939d048cb15c7b7b6af4. 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/US23A1536115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603a43da5862532b265a9d57e8650f5259e0e4093c2b81dcebcaa382c0a95b71. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US23A1535615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5368e7e40f6081f5880ed9b9ff1a5695570447c0886884020fb3caa6539f083a. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:09:56Z), 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/US23A1527943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7f9a0012f08f8afb32cada98fe8cc67360817426abd0d8e1744bbbd6232c0a. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:27:00Z), 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/US23A1528422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bf14e392b1f77123b68bfc951a45fbb8dad10eff9acc69cabb807e17813d69. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US23A1561152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c0bd3d54d62f21c7a49cf51c175cac18c0c0d051303f842ece58f4744bcd42. Chain 2 (Bitcoin): anchored in block 959003 (2026-07-21T14:43:23Z), 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/US23A1563406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0f9e84f1fd09f4faed144bab6860a26d800e5ac1bb45e49123031e556069c8. 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/US23A8925450.