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 0x1e82c104e072dabecb52d4006bd9757fca0e09cc8b761506685e5241c037e1ea. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fe11798-b045-4e44-9514-34d99c24cfa6.json and https://artists.proofprofile.net/proofs/artist/9fe11798-b045-4e44-9514-34d99c24cfa6.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 0x5cf4fcbe5ec1550f54e805cd4e155f095cc11d772d04d9c165d3c900634727bd. 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/QZMEN2351502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc855d3de558aff862aaea09c81437b936ee002a99b78813fbbc202bd6dd67c04. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZMEN2351505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b25cf0af65b272b81e120b07cace162f4db5fda8b21104e30de980fef474fa. 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/QZMEN2351506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55629d12bb0dda12709c545b4a4412d235d025fc2c45db9bf5b07222d050a01. 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/QZFZ72360518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e8a60d1c2c550c7d25e9bd1bce65d0af9135cb2a3454ea9a2526e628a36cc5. 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/QZNWX2312097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f95450a4abeff22f8c194de9b7fe6167b6a802781dad1c4d7bd2ebdc1c5bbe6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZWFL2454677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a8c4c3e76a5e7fa905cacd2539559a05a7b6c63984e2e2e9c76e0cd0934df6. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZTB92426619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784e29678a04bf47a86c8d97930d0120a7669c2c0a5fcd337e290027b12d1cb2. 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/QZLL92417399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111bd7fb7f595a92435cdad90e297aba2127dbf96294b74549974d1b26474367. 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/QZTB62391361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da64ab05157a30040ffa35b4a00a2ee82c70036acce8a09f343779573de85ca. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZES82314148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1880cc033e48838b290c00e7062593db02c9b1214b2c3ef909b2693ab1b25f2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNMZ2231601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec00f487946e00419a177df7ed611e076fb1de1620cc715ef12c17a5cf81081. 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/QZTAT2429720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2404bf9383970cf50c5078b2b026ab7e8a93e3f300979b16334ae3890a3f6bb8. 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/QZTAT2429721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bec8535518c624ea5cf3e633e4f5b82f1c5df26b59deab79881fba59ce3fc3. 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/QZTAT2429722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0168b4f8ba01dd31bb5e7de46a211239d56e6e2a31f4aa68b700e60c47aa3c21. 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/QZTAT2429723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353bfc40215fbfb6d5449cfe0afe3382d3ce6704d89799ac364c81e061ea7e39. 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/QZTAT2429724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1b3285998ef5564a90e8b5124b3e4bf1948db6630248366c716d5783f3db58. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZTAT2429725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ab1129408ac7c4e8bdaaa2792c53c48372e2d81d0ab47357695d2f6bf521b8. 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/QZTAT2429726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf1cc494bc62eb8fb7eb6223d8b90bd9e6b15e57a49a42f198a75ce2f619dd94. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAT2429727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365a2cc5b31b7aea408f1c6772ccb39cd23a78f062322bf5b4713d0f6be26308. 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/QZTAT2429728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe749310a6eb28fc8c9d859efc1b269a5b3950b006f42c2061ca6243700fd80b4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTAT2429729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe709690ae13d729eaf93d2570e62123fceb62315a6a8ec07975535a49fb0ad17. 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/QZTAT2429730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc833ae3adfcc29907fb9ec1e950ecf23ce24ba791fa23715c6a4c97ade1adfa2. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZTAT2429731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b47c5b8e83fde0ab9c15292e002f54315041f2f59c26d0cfacdbb0790d820. 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/QZTAT2429732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x531ee0045c17ab86632ede73ab4b002905f8fc42f7542ac04922793746dbb49f. 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/QZTAT2429733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43fe0d6db5918d2723ac9ec88d96ec17375bde06a6b0e9dbbc87615edc81ef2. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZTAT2429734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6261b46753bb7dad20ee639428e149a7d1714585f878a4305c04855f02da2864. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZTAT2429735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41ff96298bbba6d83a6387b3a9eb5606e4673711202aa76c16eb4d76c25bddf. 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/QZTAT2429736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a5c8483a2d7fdef1d94ed33018a738f2304e31b2180edd4d898390fdff5275. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZTAT2429737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf930da2f412e0c238b0f52006febce3c98fb6a91961c91ad884e03cc2320e0. 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/QZTAT2429738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5374287786f209dddabd4703441450194995ac7ff104e8d3c98295fa6372ed2b. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZTAT2429739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0493458c199bb6bc24c3515aeae7ae32832fd09db361dfc11e0b77dcf9f97843. 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/QZTAT2429740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae552294a2144e602a33e19a4046776e97c7bfa9db82e719d5cb5a96a4ebe81. 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/QZTAT2429741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4307a9b12c57aca36ca054ab473b3b038d68613aea1d6cd0c2d449e53cb224c3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZTAT2429742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fcbce1897a6edf18875bebe080fd75763d2546f87e839954d96433ea66f902. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZTAT2429743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5591da377842ccd055b29e424fdf24615b35a1a2d3a60e292005de5b308c2041. 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/QZTAT2429744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe37f4801235b34b16b61c4116d6b338f2f54130036d40f02d50d5ebe27d579c. 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/QZFZ32317135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb044993e6fc95c9a3f87d8386c5fa2e855fbbf2e1b2e6664b36b9ae7f2365307. 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/QZWFE2468887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be167b466da5a4c8ad51a851878baaa2c1b1dcd5e2e8d1453c4b4847c958aed. 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/QZTB32397679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28fa6c2cd37b851ba1d83abb56481e7f79c1df5e6a53bca3e23c55c367ab8b5. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZNWR2474442.