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 0x9df534647daaad5d36a49a4311dea997c0fc22e20001abeb36842e893cf49584. 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/9211caff-02e6-4496-ada1-79dfb75a52c3.json and https://artists.proofprofile.net/proofs/artist/9211caff-02e6-4496-ada1-79dfb75a52c3.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 0x8d93af1280716d50c01f5e55c4719cc0b21f9ef74888c0511718946ae280d2cf. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/ZAC031200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1939a7945f6d0e1044beafbb962705519cc32c43fe721b65f3607e4f65f684fb. Chain 2 (Bitcoin): anchored in block 957616 (2026-07-11T21:52:36Z), 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/ZAC031200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789721116a65f92a0c8a17e36d45554912069cab150208e03ebde03dc62a2d12. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ZAC031200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426747c8859d3ab529011690df9c97940dbf8a9c8852a9fa940030b987a95cb8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ZAC031200151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6051bd74e529a446547a52fc157ec4e10227f5a703497c590a9ce5d40964cfe. 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/ZAC031200152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6025c0389c4c211ab78729bbe5ee6353bd3ffa1f264238d1e234a5609e9e384. 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/ZAC031200153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7c2fc423e7cac07fac2130847d358faa462a25f995f42aa09d7edd180e21e9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ZAC031200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f49682b67ba66677d4cca4289d620b80299b715410c82f4da6027d57953a29. 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/ZAC031300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe243b74a1b207ad7db842b2d462afe2a3a13a996150f8ce4143c39cea4c4b358. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ62233690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c86283306f9ef4086729ab109386a2c37cc2c907cb93e994c43f6ec5add4d99. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:08Z), 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/QZFZ62233693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9e1e105cfd3aa9db2fe1dd6d9b2924144db70e56489b41fd242bd8c0c48e99. 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/QZHN42282929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5cf5c595b14f42b1adb6af8840818145df6eed30c2b909e7403cf43312884ed. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN42282932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac8c7f046c11df2dc8832db4d685de0b9950136a8e4f63d44f74a1e3d770bdb. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZHN42282934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77536fa9664fc67e7f7e537b978f94c269ab02ea336b47f738099033d87dfd4e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN52341964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee77a692b71e3a7e8aaef5557e55bfe36a99283712c24a77fa6b5da819376f9. 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/QZHN52341965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b08d47e4b40d7b064bbf29a658cf1a1db5d4899103a889157b82975d0a2dc13. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFX2560229.