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 0xc2073b51e501be615d462be2a3b055bccfeedbfbf2899a0b6a9ac7efddd41f32. 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/2759a65f-1a60-4b8e-8cb5-942d370c412f.json and https://artists.proofprofile.net/proofs/artist/2759a65f-1a60-4b8e-8cb5-942d370c412f.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 0x1e5f29554e26c8166eb03136b95c68497563564b93a36cc8f72f611d014817d9. 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/ES71G2412254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa530d502a7f12da2a6d3c8f6f6332d92ccc9bee5c698b5178a05849869be3e. 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/QZWDW2441864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe959fd20c1ac86aecd53fc7a2d0b1221ce03c2760a8e9773c263df8d7b6757be. 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/QM4TW2405600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3fce412f9098caba3d26e040234c1444108ec4c48abeeab10dceeb9a9fb29d. 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/QZTPX2386437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29896c1450052d763eaa895b36a3fd6844df1be0211739d6b396a55fed64e554. 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/QMFME2324654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99117a2262f6b35eb09abe2d52778ef28591c00751a6d163a127b51ffd47f21. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2332240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddde5be8323bdc803c3db14f53b842657bfd9f6c5eb3f9cbaf5594ea97c3b1b. 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/QMFME2332237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd265c277dce314591297fec6e1b6aec1d69c1ae7961b2568fa17271f310c19f0. 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/QMFME2332283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d636714f223472c82da9b457590ac3402d483dc8e03d4003b246637a84abb23. 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/QM4TX2371125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bc22e981fa2dff9ebe7c35a11d3b43f3a3d098251d5cbf761f3a44d2c443dc. 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/QMFME2332304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eaa52df6fcc10c2421950744323320c4e230a191b06984635ad4b2b516e7313. 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/QMFME2332311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6052f40f008200c4c2f8b62122137281884407f4522f9722406019c82246bc1. 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/QMFME2332313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb965a90ac46f35f2fc7d6b0b00b7769b29114baf9352c650c1c25731c68d589b. 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/QMFME2332314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd369fbb1832570388367ee218d0219e5ee195d1000506f20cc4935c271116f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2332315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e4f398023cb54e88650167c8cfc0b039b3dd0367d50d417e99ac2f180596aa. 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/QM6P42347509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c939d6b977610aff8f1a4fad43d6dce67a49db4b9805ee5138ea93f5956efd8. 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/QMBZ92303892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06f055d35d0d60fa5f0040784d9d32c90be7d1149f72f017c35f03ad7cc3d4a. 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/QMFME2332327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e26fe2e11b648525d8d843c93b85e04c3b6a8e2df648063c065da2fe78f991. 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/QMFME2332341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e64493ebf62b3fbdc0a78d088e885c2e03be9415d41b4c533121d64b32d906. 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/QMFME2332343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08cedc7989d682755caf62c96599c96de0634ff8413ab7b96bcaf7f6aa83eaf1. 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/QMFME2332344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28d08ac5e86da268f5069f60d0fac2d29b57fae31c27b70d02a15ecd1568790. 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/QMFME2332345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x959b6f2409e82c08d7bd743996c526622f333cb9ef70f079c8666f1ec666f3be. 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/QMFME2332346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805d48e6b08168c0c143c326b0f4539dfa229e5a7c60f4aa5a497b3cd694e3e9. 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/QMFME2332347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b47c3a11a3d53f08777bc20552edc779e460f6c80dbfdf20eaa5a7287031ac8. 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/QMFME2332350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d24b7343ea5c5d040cf99690a57849545bbc9562b83e4279c54debd83b3c0e. 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/QMFME2332352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd962002617e9f686276fefeb3153b96a3f22a14cd432bca3aa444eaefca54d. 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/QZTVM2482802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfa1e496b799ce22f324d88792bdc3c1ec70fbdab3432ff3d657428efe9c7d3. 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/QZTVM2482803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5656a6675545efcc94e8882c79c5b28072935aac0f10612908983cc5abf83fe5. 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/QZTVM2482804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358177cdfdb66fe7d9caed3026c28ff4153c3effc3d094d878c36cd5192e4796. 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/QZTVM2482805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfece76ff3b906d76e3c8cf5d7047182ff29105bda2c0c40b596066bb72720c71. 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/QZTVM2482806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9632556c8a6f56c98399278adf4a3ed771a8da63da33fb28312fc92960fb0605. 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/QZTVM2482807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bb9a0d4d0da59cfccc5de31834f91464fe48527bcd962bc58d3c5539013830. 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/QZTVM2482808.