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 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 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 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 0x4177f8accc17333054d0b78b9ec6017b4b11e1e7cdcf0fcae09616cb57b0b705. 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/ES71G2425585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99c66765c972491178a0afb9be0f7407aa2d5658c9ff2581c18f359805f6518. 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/ES71G2425588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b0c268b7b7e721191291c14abdb8327e897553238c051ac3b161ecc482cc26c. 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/ES71G2425590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86a528e98162756a58541c3aa47798f717cc950913f6d76e9ebd01b43c71fdcf. 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/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 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/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 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/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 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 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/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 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/BRKGM2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421ab35b73b439236ca40a359f912eb957295dc6e687c88bb0ebd122765d34b4. 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/BR6YG2400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd776e4f05e6980cf6c4ceae8ef6853ae2b73b08d15f1733c3ee254744bff21b. 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/BR46Z1800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f0e2675f906c976fb5fd20dcccfe7401f6450bef3aead79f7640d20667102f. 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/BR46Z1800013.