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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf4fcbe5ec1550f54e805cd4e155f095cc11d772d04d9c165d3c900634727bd. 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/QZMEN2351502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b25cf0af65b272b81e120b07cace162f4db5fda8b21104e30de980fef474fa. 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/QZMEN2351506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55629d12bb0dda12709c545b4a4412d235d025fc2c45db9bf5b07222d050a01. 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/QZFZ72360518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e8a60d1c2c550c7d25e9bd1bce65d0af9135cb2a3454ea9a2526e628a36cc5. 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/QZNWX2312097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784e29678a04bf47a86c8d97930d0120a7669c2c0a5fcd337e290027b12d1cb2. 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/QZLL92417399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111bd7fb7f595a92435cdad90e297aba2127dbf96294b74549974d1b26474367. 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/QZTB62391361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec00f487946e00419a177df7ed611e076fb1de1620cc715ef12c17a5cf81081. 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/QZTAT2429720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2404bf9383970cf50c5078b2b026ab7e8a93e3f300979b16334ae3890a3f6bb8. 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/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 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/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 0xe709690ae13d729eaf93d2570e62123fceb62315a6a8ec07975535a49fb0ad17. 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/QZTAT2429730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86b47c5b8e83fde0ab9c15292e002f54315041f2f59c26d0cfacdbb0790d820. 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/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 0xd41ff96298bbba6d83a6387b3a9eb5606e4673711202aa76c16eb4d76c25bddf. 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/QZTAT2429736.
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 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 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.
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 0xfe37f4801235b34b16b61c4116d6b338f2f54130036d40f02d50d5ebe27d579c. 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/QZFZ32317135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb044993e6fc95c9a3f87d8386c5fa2e855fbbf2e1b2e6664b36b9ae7f2365307. 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/QZWFE2468887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be167b466da5a4c8ad51a851878baaa2c1b1dcd5e2e8d1453c4b4847c958aed. 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/QZTB32397679.