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 0xea07882937de9c509e77a79aaee26235146a7e9aa5cc1117cd9e35d4ef76bc03. 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/3209e62d-e1ca-4257-8430-fff872f7d09a.json and https://artists.proofprofile.net/proofs/artist/3209e62d-e1ca-4257-8430-fff872f7d09a.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 0x16486882f3ce8ccb191d3d2cd04e3aa599ac8e3bab0bf80bb66f5d1a6f1ca224. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZNWU2134620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80db819809ce0fafa852b1ce9b321ed919b3e2a0419ca2c2a332887b9c742c32. 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/QZNWT2117764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc650e6da8a3e93da470c9d1ac3077d02ead1c6bad90fd597db23a995cf2b4c88. 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/QZNMV2353487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805529da2e3c43a10dc0e99e9977391e1fd6f60296e3d11b281ecbabc4db845c. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZNMV2353490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36b7dbbe3abcf694d6d41c3871a69fa2e2358bed4a4afc25d9794b83ff129f5. 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/QZMEM2394463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d67b9e9a4fff84db404e96660fd95e45c6e69083439897d047fca5293afc0b. 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/QZNMV2353491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4005bf7bf532dd12d0e30ee491209ddbaae7dfda69a55a1d15caecf6030b0b0f. 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/QZHN82394004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade7e162f6dc84adb1aa3f41405006c757fa8c8ddcac9b5eb6dca209d382cc19. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:40:36Z), 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/QZNMV2353492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc03e54672531c24e4a695b1894ec808f4e2eea6409e2500c773dd8bf9487b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:17:35Z), 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/USLD91753186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa405ec6c06961884889177f08009265a3ba208d0716e04bfdc3ac4587dbe7b5b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNMV2353489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf0c2a6c3ae7462a46a711ace3d7a92004f5e5173469940f816dfb5bb38dc6c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/USLD91755191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3dc8e3470681b058ff750f38c5e39f790af0c4de8c2332a28b8e4a6604c48bf. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/USLD91756356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4dc03e54672531c24e4a695b1894ec808f4e2eea6409e2500c773dd8bf9487b. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USLD91753186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab7e18fb8c0b95bc843d4f8fd2a0900f32ae039fb54ae6d678e317fec756fc1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USLD91760938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695a2033dbd44cd09fe47c8b5e6df1a98f568a610e502cdc1898ec7c9e8fa6b3. 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/USLD91778989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc156b7d0c43bb913e788aa581b4c10d7073c41058ee425d2fd751cbacdbe3cf5. 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/USLD91773266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd52177da699289255fb8f65f9735d9420cce8f668ac8ba7dde9c5096fca3d4. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USLD91778650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463c619e91c16c19afd6e3393255f549344373ce3ea1438fffea586e7cdab73c. 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/USLD91778990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4df2988ac3d9da81c98c4c31c73873d1292bec2d04fabaca074c3fcb9cbb32. 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/USLD91778991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6963b456888fdcba8921eb3edec63ed62cc2b39cf493ffab62cfe428592600a4. 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/USLD91765730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f33d5ed73435d299d8b59ad587bf1d69d6ebd7c9e9925ddac11d1b58d00fc. 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/USLD91776622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083c91ead7de101dbe066977fc3d91e5c9ced346a339c9e4498210cdb3c771b8. 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/USLD91778653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a69dc2200dcd552c481e4a0a9c7bfa397e3c19dcfc949ac1843c0a201a2612e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/USLD91778648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772709ef2007f705df22c8df2d602aa2b864331a3e1c1da47d4560154959d2ce. 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/USLD91778649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd52177da699289255fb8f65f9735d9420cce8f668ac8ba7dde9c5096fca3d4. 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/USLD91778650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf6b9805f0025cd1af94a830119e50a40414fb6de454b93b5a5f6031152fc61. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USLD91778651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f167ab34f5105e27c031004afb183156db5dcb252f73e44f83e2b9b38345cd8. 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/USLD91778652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376a22e94b6a4ef00977309db1138a17e94ceedc77dcb2c0790761838bebc797. 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/USLD91765728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f33d5ed73435d299d8b59ad587bf1d69d6ebd7c9e9925ddac11d1b58d00fc. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:57:03Z), 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/USLD91776622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083c91ead7de101dbe066977fc3d91e5c9ced346a339c9e4498210cdb3c771b8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USLD91778653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8e27a0447d3b7da3fb86eb330ffe670ca65566766f43e8c3eba7b77bb42157. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/AUQ9D2404971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11103a351354b9af1bdd24c953b48cb91c3cd6023ebca4923449064b079e685e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLRD52302349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee3a52fa3c40810c203fcbb204cfc902fe44a11278bc548ccef1b731f0922b9. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/AUGBT2333050.
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