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 0x1d0ad33356f9939f19fa8f6fdd436905e9cc22b2972149b7d3f0c43ba1eba473. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ea437de-f97c-41f4-aca9-e68237bd2200.json and https://artists.proofprofile.net/proofs/artist/7ea437de-f97c-41f4-aca9-e68237bd2200.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 0x9f8dde32b522287711a11c6976d50be215836ed2f051dd788db4ff987486289d. 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/BCMUI2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e85835c616713f9666becf946a7120d1647608ace8947b72c13df8fab95ba1. 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/ES71G2425583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c4afe1f13e055b1a50127711616811679913fc3bd67c77f0721a59aca4a748. 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/ES71G2425584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873a8dab0a6cb3c48888f1a2605ade0b3866be31d00cdf852c0afb5cd63e86f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ES71G2425586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99c66765c972491178a0afb9be0f7407aa2d5658c9ff2581c18f359805f6518. 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/ES71G2425588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c268b7b7e721191291c14abdb8327e897553238c051ac3b161ecc482cc26c. 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/ES71G2425590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a47005411ab8e290a2243737162d6518b900554af6b545b07881ad02362fb89. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/ES71G2425591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e194ef737b5d609e1e727e25bfac96c994902a62ea54443ae1cac5483f16f3. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES71G2425592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee7f9577b462d20c68495cf261c7e944993df061e209eaf7d8b292a42cd310f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/ES71G2425589.
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 0x86a528e98162756a58541c3aa47798f717cc950913f6d76e9ebd01b43c71fdcf. 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/BCBA42400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e056eb0574bc11b6a19f2a55224aedcc5d2695293b2c22d9b154dff63e4e69. 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/BCBA42400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebc8ba1820be2d86b72dad5753d4862f8d35250d78b25a346f5e36488d34a2e. 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/BCBA42400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87b9d425084496d60be09e82ac0135d3886a8210adfa66cf4a2e8832fc64d42. 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/BCBA42400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96142f8914fdb50de9d816915ab3496d784668f82ccd257d5309d3e281571e34. 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/BCBA42400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cf85a5672b9ea9921b3175dade011c9cd2a25b3480079a4b9db04bfeea141d. 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/BCBA42400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0858759bd079223e5cf395e11a3d9f55170f38de3473bef8080b335f4b877c83. 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/BCBA42400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5660d639b3efaebf68ce6ec614f6692c77a3216ccbad8ad7458e3c90c662b4c1. 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/BCBA42400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bfbe93547bfa9c4c05ce2d97ffe298e917c29bbaeb7680ad119f666c66bfad. 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/BCBA42400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ab345bb63cfa4cef1c8adc03c52aafb781193922639c11a94b890ad2f4c82c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCJ682400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd66ee91b49df12aa76cf793b960245d241e3623a244cda600ca18fee4e6c0e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCJ682400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2557a6a0310ff84461d353604bbdfafab533026f42071c6359572b1e50e1029b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCJ682400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823c0e2ab0d215e5a41fc8481dc7842865ed5f7fefc124b5f2fec4bca8841699. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BCJ682400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174382b697af51cff22a3cf818a77bec12eff4427ec793e7c6e851e72167ab68. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/BCJ682400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad51744cbbd71433488effcc58e0c741d3b6f6809bc95f780ee7e1eb742133a2. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/BCJ682400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49561908e15cad776059b518ac44357fd567e7c87ac1ca5d700d842c6a90f41f. 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/BRKGM2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1c47eec2c0a272d005cacfa4542df99b20a4c112b2e1eefb9896cac74e4e0b5. 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/BRKGM2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97a101d4365b767722e1edde41495b664d27d0d82c9e032dc8c0a125c5ba62e. 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/BRKGM2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25592cb15de44fefb47e62167ad9f497cfa5c989dec0191422253125baed462. 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/BRKGM2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12bc23b5025c3e4f230d310ead51d508c0487a4f323ee1ceed28c1a05ab1ae7. 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/BRKGM2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421ab35b73b439236ca40a359f912eb957295dc6e687c88bb0ebd122765d34b4. 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/BR6YG2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4207ff34a942bf38b224f07f6d0405b3637e37ea05f1f7e5e7c2a506edd3bb4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR6YG2400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac0b498e0ae37b0b8ad47538fed39cac59fc91f9db0a0393934659112b32bca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR6YG2400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf64072bb54f908e2794dbf74d3b7a38f0637e8a3a5c2aab9f132f15588bfabda. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BR46Z1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd776e4f05e6980cf6c4ceae8ef6853ae2b73b08d15f1733c3ee254744bff21b. 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/BR46Z1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24083b1b66500e68956f86cac8c0955733dc56a54056750f907bc5537c7a4f22. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BR46Z1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f0e2675f906c976fb5fd20dcccfe7401f6450bef3aead79f7640d20667102f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BR46Z1800013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000f155b4097f03a630ac200c9f8a7d6df93a49b481caeef768bba0019c7d121. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BR46Z1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa926885209d5c734cdf67cc110db3f476d9705988b0d122089e7c0de7614c2f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BKD8J2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3104d8cd1fba16bfdcd40535b02fd14ad96e1e36e15305da9f801d43e48a1bb7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BCB742200002.