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 0x6956920196c9a9e5e65ca5bf0614df21f294de8ffc949f148b302b5c87797f8c. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/be6391b6-6df6-4bdf-86b9-384ab0d2b792.json and https://artists.proofprofile.net/proofs/artist/be6391b6-6df6-4bdf-86b9-384ab0d2b792.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 0x8cc4cd5dd96406bc345073071d38c4d58ff2ffa34b6d6407b04de60382985538. 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/QT5M52539802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7cbeab5d08df48754636494616928218c1ac00cb8d67750d9f4acf6dde32fb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT5M52568972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fdbebfe12f5e54179f5b387a905505891239f618686e8567d7b148e84bbb69. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT5M52589225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dd9a52b61e66d331fffc68c594953505aa5b59023d43b50f1e17b9e273690e. 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/QT5M52510589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817248d152d62d6bb9f47822f48b197603230c750daeeb86e8c66b4c3726dd8e. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT5M52512076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fbc8b456b92d4a7a43b64336dcf5775d22ef108cf1945488c2d59b8bad33de. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QT5M52557208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc79bc7573181ec8c2e9be694e1dcc8aeb842e79c72de4edbdcd388fe5aeb690. 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/QT5M52519237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ac42b12d59584507c58693e0bba68655448863afb139476be21e71e5dbcf67. 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/QT5M52548484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fac3cea32b9db9e8925f9f85b6d405bf39c5904837b13c339bb5ab663bcc00. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT5M52525432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20380f4544a9416258bca7c6151b28d9fadc5ba94737d384003a82489405f58. 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/QT5M52577415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7824429a08324f43d5398d01501958769c0cb61e577ce2e291b6246886f54a7. 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/QT5M52549651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16d81ef92b40573bbe8a39af96b72bec2d3f85324155ef5805e622165881dcd. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QT5M52552626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb734bbdfb1297e92ad3858889ba5f9f48b22542af66e07ae1fc9b09225b49302. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QT5M52552090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50274817a807cf2758e3a235f9f64fd33cf7fc174875b5e33e5cc02fc9c3780d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QT5M52587881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7012168eff79555dd4dfe6dddfcf3a03cbc9d6607c69de3a7805fde6f103305. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QT5M52507636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc54f53093aec664c2bd7d3b4f14234301f8faf2cd823dd1b449db1ef3ae0f9. Chain 2 (Bitcoin): anchored in block 959147 (2026-07-22T15:43:44Z), 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/QT5M52523820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71d054665c03c72f986d88439a4d51d76dcd4363e6c25dfd0fc1a8804319ad5. 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/QT5M52505407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ace5af034bca557da379bf88ebc4751b5ee18f3fbdac5224651e5c4b56bc09. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QT5M52573264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b69937f433f147ef1685a3435293e58ed2ba1ae23a2b69364abf9fd45f3e549. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QT5M52530057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086be93c86adb509edd0968e5ea32356ef025a230c0263ea0f58d4f84b9417fb. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT5M52521097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b774543904e36e9ebcd13d8e278451500a66fe3ccb7cc2e140d2c254ff1000. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QT5M52522984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0240b1805e111db4b5c56ba891916723ff986f80db03c68b2760d0772de1d6. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QT5M52599529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5033bdd2733c587ae1c6d071d053a2cf58992581c5d30a106373d84a502ccd5. 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/QT5M52582114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e50b261aac26df9f3f03555b40fcd545014a93eeee086fa7cda3d75de3f2de. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T13:24:39Z), 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/QT5M52553247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fdfaea77a5759dca5c07c05450f7fc225028303f73bb392545ef20289524b8. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QT5M52542013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56d4929f73463c82f1cbbe07b0c683f942a03e93c9ec1f3fe96fdde26d2a4b3. 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/QT5M52533172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e3af2d166eb25f886d470478ae7b951aef587eb57b94993fe4a6e65fbe1ef. 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/QT5M52546551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc702ff39cebc125c5d3e6157b2a164686465d8c71c244257564e4cd92da6f79. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT5M52502084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098c38a2251f004aa1aa670292b79b982d43a1d52ecb29accc54a2e27096dab2. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QT5M52533388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc54db8811d753ae1815b93472f0ed27fad3a45d90f5cec1b460266a36b9a3d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QT5M52590671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2facce34abfece7d90d0b6fa936f934e1f58014f9231808e1b823a0004c262f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QT5M52581276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f660b330c916f0271b26e471927c5a26a5de38b6ad240bc88a06106da79305d. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QT5M52597006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11312fd1ceafffcd9d084b43216b3c12cb05a74a186e408ff0be90c1408e05de. 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/QT5M52526132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a347df8cbe2add936d79ac10769eccbe640a5d3ed89b2f11aa1f04ea86482b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT5M52536551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc451c95a9cc529f1dfbf54e7741041d7665675de3e0ad27ad6313ee9ae5584c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT5M52519788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bd0ce5195ff330b0b16bc81551c8a34434371466ac8fdfea4d43c7f08fb998. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QT5M52580110.