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 0x9d23cc7a1c24178ab2f5adb9e5e2946f9701c82e7a24654c8d601dea29f82a52. 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/8dc21221-8b88-4440-8d81-19f9b54f8313.json and https://artists.proofprofile.net/proofs/artist/8dc21221-8b88-4440-8d81-19f9b54f8313.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 0x1b0c7e314ac928d3e9555df033ba5dd66d5a695587ff13bcc2a11d35082e2033. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADA1703817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c704b042627583491531fad55f51ad85a1ad2b45b83c06ce34008a695c081a. 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/TCADA1703825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2a0f96ef9d3aef8a1e0e4a382e98f9f15bf13b3c47b1d184848b65a9b0a6cd. 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/TCADA1703833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b036e4b930a4c2bf6fb4804c199af1bb77f4cdf5fb1abbc4d6c95ffebf8f96c. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR6F31801680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a0e56337d9d83141dc89a331150fe28ebf8bd48ce71223ce791e95d8f029c51. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6F31801740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34ca0d69cc5dcae5199c100e490410c0c16dd19d244951dbbd137cc8622b812. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/FR6F31801760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02670d83d8282461c95b008fe2b707dd69939938d33c7caad0c36e6275818097. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FR6F31801780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df0fa0d93435b8b636e7120ede493a4984af4504c51bd240c16d2a6598b1793. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR6F31801800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6da9ab529b5a2d13bcb4fdac985dbc94c8f8024a8dd6d7ee9e386d0fcd6e2a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR6F31801480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f173d3834060689bc60d63478518e46a06caf45c96795aa301edbcd18927d52. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/FR6F31801710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15200b8aca4b9e1979bf8fd0d5eb922108fa2b098917087687e153445cf216d1. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR6F31801750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d819acc70ed38355468867de94fae74901acbb13c038cdc1707234cb735f1da. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR6F32000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca183df04f398bc4d810d570edc481d89d1a572b961a24b22933d0f0c04a4d7c. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR6F32000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3556afdc777aa1b4906b311ef23c5ceff76c3f2b6c368be498560184a178da19. 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/FR6F32001090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef81332ebc10b36a502210c51145cca4b373263a7ae6b2819d0066d74f9c33. 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/FR6F32101240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ce82edc703b5449eceda3fc4ee4e55bc56c219bfce7248b10b722a4807acfd. 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/FR6F32101500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44342ac4aa75f71c61e5f4875040600701e62391fbf0c3ee54bb54efd62be3d7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR6F32400190.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b0823259c428584873009335045d0f0505a0bef5b2620f74d966cb813da3f0. 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/TCADA1703818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16ca86b99d6d2162f3d3f04bebbce041292df1dbd1d61ad48adb4b8c6e197d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRP3F1902860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1652dd26e5ec9a1b2dab25bcf4dcc863bca7f427eb5b02d0301e4be31e987b11. 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/TCACY1789604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac26f1289748832ec405bdad3e8852b3194b00acae2ea4715854a9487675079. 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/FRUM72301665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ddf759777260ccaad3fbe3928b28f79cc01c98bbccaa4c39c732ae3ed99c8. 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/FR7KS2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bd0869f9a34e94cc0cf3f779ae4b43bba1eea5fd3e643db815a07b56fc5f02. 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/FR7KS2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e96896ac85ae929397ea85d235f7e05ff540b0d877e35a20353dc2643c6556f. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/QM6MZ2013776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ef81332ebc10b36a502210c51145cca4b373263a7ae6b2819d0066d74f9c33. 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/FR6F32101240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7019ac815526db74bfef7e50d1fea81a1d92db75f0d6f8ab236f0cb877dc51c1. 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/FR8Y72300283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe14bc678d63d4bfed7e97a0b14ea18dfd7419a8570478fc32507eeb7ea7aa61b. 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/FRT092400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb372f2a2594c0c359978816136193a1982a2426c0b9c97c14f637ec0a41eb65. 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/FR2W61700026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45321e7678752380dd54ae9407f689748bc9cc471f02b333c08cf1b90cb36411. 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/FR9W11504377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2ec84de1872dd7d33996a7d86936f773ac1b968509433e5956c8c65b3a3505. 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/FR9W12014946.