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 0x6f8feb762aa46c4dd8720a8adf5f6629cb745fe9f65f15903956294fb7ee7023. 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/af4b4d42-1af1-479b-b670-c2eda44e7abc.json and https://artists.proofprofile.net/proofs/artist/af4b4d42-1af1-479b-b670-c2eda44e7abc.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 0x8364d26db2bfb611c4dc0d617a5b9898ebec6b1e935fa52b0baad4220c535421. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWY2076131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12393ed9f6457321bc838e24de0b84e733cce217e75635614d1da9e8faafc09. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZFZ32116286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204265a41c4b323e7e3171dbc95dbfd38228249859ce917eafcf18222e2d1132. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZFZ62127693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599a384b64ba0669dd84ee6a30042c0f7ba6235de17c35dba2e694dbb15ae6e7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZMEM2198539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecada7d5f3e584dfef5b655eb882cf74915bb744288747feed32d81fc76f1b29. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAT2104837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f62fd92bf0b2d34a18b3cd6bd87272f371ccb51087bd1a459a7584a5e6cf15. 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/QZFYY2246826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1bc44f2cfd1259ee5cfcfd9fcaf93f6b3c4d4129c039ef2e28f1de76ab1053. 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/QZFZ32226531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc09685caa36f58a2b7bd5486babd856b31e96781a3664ec7647e64845cf1410. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWZ2289588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ddc3bcd79bda6efca940354f241455c29b6c474aaff17ba41e90c3cacd7908. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/QZMER2469268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd302294c8299da2f004150be6964ac9c2bff7c84db452c58c3dba0e0a382ab5. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:53:57Z), 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/QZTB92431053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa878eb3b4835a8f20b9f593322e3b309d57508e3e7e51e1d0d79a1a4fd01b9cb. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:07Z), 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/QZTBE2472080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c99ab12dd6f55d85a3aab7ab7bf9992c68efdf516323dbd9eabd525df82aa9c. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFV2450165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e97738832587997b9033840bb4f5a05cc6172e39ce5c31a1cfeda36612f269d. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZZ7L2414402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f40a3934ef267038472c3653e8445f539ac6bcf043ab77ff4ab39fe7d78f10. 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/QZZ7V2431006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbddb75a0e115ecbe1199b6709ffef9ba4849b85687775fb195f2f0c2c987b462. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA42566387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4c1b988d73d2a13728c8de8024e54bf04918112db17638cfd2fdd510fe9d0a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWFM2507451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24914e54097f5d68df022a0146740d23077246f46187f01bef1ac023504ab1d9. Chain 2 (Bitcoin): anchored in block 958535 (2026-07-18T09:42:49Z), 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/QZZ792587966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750a547ace89c216d42baa81919ee4dcc80900fb66cd7a9c660cb662132b4076. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F62535577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7b7384f1183949184c8499b257a297d4259e7cd5ba9e297d8ca33160ee48b2. 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/CA5KR1962820.