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 0x239dc4319311bb83cfaa5b7640627b7e56ea42d52fd54c44f8257acddb1dbedf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/43660371-ad7f-4fe3-8f72-e82e660e17a7.json and https://artists.proofprofile.net/proofs/artist/43660371-ad7f-4fe3-8f72-e82e660e17a7.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 0x66c63b8e1141d02736fa87d32ffa9b7dc205af2a7bd72869634a88170c3600b9. 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/USMLG2401029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e590972cb22979f7528d33bba6e5c4099977aefa82be60c4d5665ac7e4f0cf2. 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/USMLG2401081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec990cd8d5ef247162984358d6637c2481ff35b97714e4c045634dfc53a928b. 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/QZFYZ2300810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf874a942cf4a91d07d51fd428e5745639e5396640c6cf845ca984655e521cf41. 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/QZNWT2279710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de2949fb8a1f312ec72fb3d1e33869bd1ba4e3ecbc7838c75116f55a0efd1ca. 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/QZNWR2247665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb627d0eebb481d57f82fafb1b38b78758a9d60f8b356fdcc6b61c06a85c9741f. 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/QZMEQ2228556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf28029c0fc1711074242b20f9148894cca79567857d716bc056df3b2c713c3. 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/QZVEM2387422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa60174f7145da581cea0cb38e893f48d770cdd4b7d537cf3b1b2ff6c28890a8f. 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/CA5KR2394633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bf016fd14145ed8ff8d13882d4f8d8f0c39bc844219139d0dac2673b4c6dfe. 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/QZVFR2300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb4451208f953b858889866a89c34a001511efcb91da31c330ca18e587a37a. 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/QZVFR2300725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580863b9106cb8ff030681e5ec4371cfc56bfd1f8736c9f9d3640447bcde6c48. 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/CH7811107807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0087d3c952034fe187befd3fb0afa9db22be523663fbf4916c393467ebda5519. 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/QZHN32370105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3044e6d5e79e16f91233301e04bda2afed188bdcc60e8236c407d0c849463866. 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/QZTAZ2288031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff96f55424c0ba8f903e1954b3454faea59658a23a1388c8e922bc2ead1dc6a. 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/QZTAZ2264245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa174b8072587bb53ad72f53695da48e07af86fbd2e26a9c5d332ae0b3347af45. 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/QZTAY2261058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f178707187ec04998f43239b520795ec0971e336612f43ffc6504f91d86e8ad. 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/QZNWZ2211918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292d538c103eac992fd1eb469a519cd05b64e209130d53dae897f0cc7ca938d3. 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/QZNWX2235524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7eb4ba8c3abe44084d9f04e12727c784108b7d784ffccf3ffdff48ae95c502. 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/QZNWU2264236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb63153d4a77116eb11dcabc4e1a22c3b729f249e99237fcf6cbe51527cae6d92. 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/QZNWU2279662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37310ac9203e2e562c558e2d444a304d5f9fd45745e1ad04622beb54c5d11a1f. 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/QZNWS2215386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bab4abed6c34e4cda39e97196aecbae51b305489c2e1784ae0858f64bc33852. 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/QZVFR2301566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fbf738e5a44be50ef48e5a2137ede2d21d3b6a13eb3c830eaef9be537947ae. 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/QZVFR2301739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd57eff13800c82fd20e5ab87eff0859e0e761fe0f97120943eb001051ce340b. 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/QZHN82397083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d28bb86784a92605da0ef44a4af59411cb150cf74cf6cefda43fd14252465d6. 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/QZTBA2276813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fbf738e5a44be50ef48e5a2137ede2d21d3b6a13eb3c830eaef9be537947ae. 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/QZVFR2301739.