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 0xabedc784d2a9ef00c0b192acb937f0d0af3a5ee1ea0ebedc9d3400f9f4031820. 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/f7f06d8d-adca-45dc-bd5d-011e7c67616e.json and https://artists.proofprofile.net/proofs/artist/f7f06d8d-adca-45dc-bd5d-011e7c67616e.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 0x484f52584b25c87b94540dfc98bcbaa406c89b77f0a91516a65edffa3598e27c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE66N2365138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cad0ba7dfd97665450c8a71d91781c18b7e22e89a8c4da82fe9654cbbaebdc. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6A92390774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672a1b92279d0407c4a3c9582fc8b432ba0509e6e50c3f4762c35634c5357423. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6A92385604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130d864e881d62dc04cd2ad16d2b0593c5231cbeed151026211437726e774a6c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE66N2388929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfc5946d5a060a9e4771301225fc3ed641296a85eb982025efa1c8a0bf0ea35. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6A92386982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4c688add2f7398b4fd2d3992059193d14b05c06f9c7530bf5b58edaf859423d. 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/SE6A92337528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f089b040c287d9355baefd4243e8c4c355dd070d32c97385b169ad8750d75a5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2301705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bebec388584e0b40a7cdb872c9540f228dafe31c63c55a493a2bd444741d161. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2328427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b13c3a0653b69928e9b7ed7b5a5f98cbddb936fa7487226745f11912ee019b1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE62M2301367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9788b4fbb53096ffc3bb804f10701b96f4e80bb85583902962754ee6c441636d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/SE62M2366488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352c0fdc92b42e3e6aa43407edf41e957801d72376414d8797d4d2218c906661. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XX2391700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c4ce4b5c61fef47223c5b710f9e6979925a1593c791ffa1ec4506f993398ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2349612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbc79ac8144dfa90c880abf89c8ac531fbf5d28a67a2cec8fbb21f910e6e5a2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XX2331655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c42cdfb78305d16ba0b15f6bc3266bbe5638930f02cad02af63bdfdd380364. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XX2360945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52346153bce20e44c890a3216a18883040a0cfe444e7ea7209907c0ad65a4f67. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE66N2370602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933989c3778e4a528317b1427f4c0f36d35b98bd344210cd58de5364ee9dceee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE66N2320160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac3a5f1e3a701278171982d8da9d32687048d726bf2804c8be4461bef1338bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6XY2398493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca40575911ed038dc50d5ae2e3d99a12ed8334eecd64271b7e012b69c65d318d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6A92331619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ec0c83f3369660a20113198704bf63c35274ee3d67f1b9fe843d95244f2b90. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6A92304324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa147596f7e2a6d24d1f3ffc453db0d6d78a40866f0c0bfddcb32903c703ab3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE62M2310741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467af3c10c603c29c1b3b5f6b982dbd8d258ea38090c2fb299d6d6f5e6180d08. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XX2302321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b320073ca03e597de8ce174a8e1e9d4f07bbc1c00dda962b033c379f709ea81. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XX2312801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a8a4c4871294320665e4ec5a93cf3f3f949fffdddf97f299f2ecccd9eddb7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE66N2341555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fed06b8e7206e6fbd5361dd329ee294f962dacabdb00e8ff0dc085507b68919. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XW2343613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc392f5c2d05b29f448d77c367c36c4f946206d526c333b676bc8cb093de78780. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6SA2364367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe220ab20695f389b38f6a766eef59982d098cc02dee0f5c723baef690741e6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6SA2332580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadc55db5afea0604fdc74219375e6bddb6e2b243552319cfd479b7f0ccb04cd9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6TI2398773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fe5df3d1816ef5cc6188059cacfb0a2b6fa441ba6cd0fa7870610b5f711bb7. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XY2317314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d595344be365e251f7a1632cd11830a37f01c83e3a169f77e9d8b5e0067af6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6SA2350088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1d15a3432e82cea236828c9c185376d486a22d1df838c5706bf22866674ac5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XW2314348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1a575570edba93473a965bce2b4ec599644c84cd3d22dc67a6c92bfc7eb84e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6TI2396509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3b8f2aae7c827746f80058b6f45697edbbd5029bf0b5892a43ec01ec75562f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6SA2306446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34215db0557e383d7e348c641ac5e95ec9816d12edf47d2fee24cc658c20750e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USA2P2352774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ed205d547f8a9b7aad4aeb4a9dc974ec8b30dfa16171eeab754fd5f09f1cb4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6I32341606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d823a072ce9c9498a4c738f6acf6e35d1a36ee1326c9674b01d8c9e3b0598b4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE6SA2190794.