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 0xb664b96b1b6a1d0eada9571d918f4927fb3c83b91269d7fa8231616f4a7b0777. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef1c2ac3-0ff5-4497-9deb-9e1cc6feee90.json and https://artists.proofprofile.net/proofs/artist/ef1c2ac3-0ff5-4497-9deb-9e1cc6feee90.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 0xa8ab51bb04ed6cd78525b2cdc4acb744ac120c19bef12d41500d2bf7473ffec1. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZK6M1916567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3695915023139aeafb1b0c6db44798c9f957fc5b901420fe552247ef9d900c9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFZ22025551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafc309d584b3875722897b6e3e9f1a2346ba90de8223273f19397ab0c34226b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:43:16Z), 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/QZES72273495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e83b745c6dda1aaf95d711bc54714b2e9ddad1b550d5d281025e0438b951227. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN92229540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3cd49cae4c017d9c8f3cd71fa4642dc7df3c8151bcc73db559842e234a4812. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/QZHN92229542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bde90dc3e25492c8a02ea3a86833316f2dcec5b62209e2013e9daff3eb70fb9. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:18Z), 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/QZHN92229543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03417ad924f00d82fbeacf99d64250c6d71fa5a3f2a0d15c24e53a638ac020b1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN92229544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6790ffaeba2579dfaf956a376a8a414be7023c46ccb196f6c0f2e4bc00743942. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:52:23Z), 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/QZHN92229545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ec80f9e56362cbdec0017e63376d2af155c0c5ba8caa86b8bb551d1a198ce4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZHN92229547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318c158b5117f07df3759d77e31b4ae634424c501914d479b70c23a3b00bd667. 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/QZHN72348774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd710e596c595e28443c4def4821057f91132cca5f86fc766309eb39fb7fcf3ba. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHN72348775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd9d1cbe404a71827e58364ac73ac86061de1b40896422dda8ba567271587fa. 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/QZHN72348776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35bcc1e4b7ed83a2172bc8553a57f632c088bccdd5ebb84ffb9955fe1858c64. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:35:19Z), 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/QZHN72348777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999e15b22cee080a9e0df91e22f8df86d118e6cb3466b56e4ba9f717345f1b22. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZRP42232865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa010b225aaccfdfb64b5574048aa81a399a089482e8a8dc107e0fbea450447. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:51:02Z), 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/QZHN72348781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774c97708cda619b32e4e9dddf3fa44fc4a2e4ecd9d97c357bf4a882da3f9752. 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/QZHN72348782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bd26eed838f17577ea885596bae55e14cc402a931ff1b138dc684b191955f9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTBF2541281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8668dd142b5d8995fe4a6e6b8424973995a40956ac2e87f56e61962aed8a0f8b. 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/QZHNB2226673.