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 0x5f1f9079e402b2145cabc418444f875e47b4dd9aa2846880a95d47e6344a3b26. 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/b3e358f3-191e-4bf5-acab-fa79088b33a9.json and https://artists.proofprofile.net/proofs/artist/b3e358f3-191e-4bf5-acab-fa79088b33a9.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 0x173a0c5a829f5987a63ad6a688099c514af867eda72b8adb785de41c9e20ee41. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/USA370512703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed415f0410f899c759804252167557ee060402ee25527c4e3bfd0888b4eb9f53. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USA370512709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8702676d7eb665ca0dc41cb83091dc5a1432f0e548b0ce4a1c3fc1782d369a6f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USA370512710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc055ed559011b15b38741c106e6d5eeee4bbd564d0f2fc26414ecdc2c65d1825. 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/USA370512712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86628112c617da9eda36f25d262b30e9f4d889e88bf77afa522c55a1fde3808b. 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/ITG270700112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd57adfc674d1bf93b2a02d57651327d550a92640e164222755705648c437b9a. 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/ITG270700113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2deae7500a6a18c2c0788a048af5f0e9e8b414824020154f50b467443883e6. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:00:48Z), 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/ITG270700116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9cf2972e2282548f99cf8fa23604d8184ec25d48375bbff5dd4f8c782ef496. 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/ITG270700117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3a7ee8833a563b2129199b404c7b34c08a3f5999355fefdc6d6b7922ab4ee2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:38:13Z), 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/ITG270700118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa533bf2997b7c2ddc675bfc975235a8a6f59141069a16319959efa5a5aef8885. 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/ITG270700119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f4c1f288e850395f839665253929dfc585cac7c425a9a0df3a92ae15aa94ce. 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/ITG270700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ed1186cdfd6bb3dae8df4e6295dece5dd82ea34055878efeddd02e9d890049. 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/ITG270700121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf56db7d85bd44e5af848992d6bef7b50610e33a46c8990518e03be2ac6d32f97. 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/ITG271000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a18d812b14960d29d22a6ad1d9b47be7e9581653e650b56a28bf615f520f3cf. 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/ITG271000224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5934ce045ccd039863b031eaf578ca9cccc22e272e0041277ac46182532b92. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/ITG271000225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf956742823a4e187c963b8372f42ebd33377345fe38563ddafa19bbe38d98e1f. 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/ITG271000226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1987c70e221d5588334c58fa96e6ad83bfac3f3954266f23b411db14ba123a14. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/ITG271000227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea41ed620f16732bf8cb5ea21d7d551241737b5c32a874011103991263cc3d3. 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/ITG271000228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed39cef94df8be35c8ef30814981741c66a613be841ae5d26859a8b3a8260e6. 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/ITG271000229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b8b4dd65bea89148f53bf265ee56461488ed50ee02ee286a48690aff87a63f. 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/ITG271000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443519d83201e9321c751a3bb765327652c923b0da134251a76871ef19b3ed06. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ITG271000231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9657f56401ffcbc0291cd9410a6496c17a1a13de014abb2bd2365295552294f1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:26:32Z), 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/ITG271000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d29b542f745a26eed367c8d865679e32101306fc4d295ffaceff898bf2cf7a. 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/ITG271400094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623336915d4d1457f58cd8e5baf92fcc8fbef73bc0928ac20dee7dcf5befcf45. 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/ITG271400096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909c73b7bb1807c6e95d0b7b447625e2f7e6c5789badcd7e3a8e5ddba537f899. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/ITG271400098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab622096419b3c732403df9a212678a0abd82fdfc4880bb2aaba5b3145ecee9. 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/ITG271400093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50714d31ff1d92c5df1012fe8dd08515a709e0889e2abd3051df9ffa7790f6aa. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/ITG271400095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9572eb475982cae01251578f2228659a43e3d302d35b9b15b0784f0785c12807. 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/ITG271400099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af738b66a2ac43a19911309d2aa3c6210edb6dddbcbadcb551d206120b915f3. 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/ITG271400100.