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 0x56b9f37b3988a7c9e7774491c1133f7e397c98db672e8c94ac778fa7069a6421. 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/4e3d14b4-72e5-40b1-afc4-35fb1be9302e.json and https://artists.proofprofile.net/proofs/artist/4e3d14b4-72e5-40b1-afc4-35fb1be9302e.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 0x8d82315e49743af649888e7788da5860525ea52391b075133e0b74bebef0d7b8. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:03:23Z), 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/SE6A91976362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee285dd13d95f30260bde280938e883b3d8581ea742eb394df591acc3112d52. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/SE6A91976363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33610a11d25a25ef0d9780e5140c87a98b552785db07062a50cceb4effc85ee3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE6A91976366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4163603b5379bd5f49974f945624582c6ce288568a9290d2b85e6d3264bddbe. 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/SE6A91976367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d37fffc871870faba4adb13b913242c9f8fff84fa66757f624eb2d9d130d08. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/SE6A91976369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfb281508088db11b714f53210edaa37b187b35cd10316c6986507472bcfb3f0. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZDQH2268583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ef78aff913e3ebae8b31b792330ef834b2733271219958204e540036cb8dd. 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/QZDQH2273034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f54aa611e940ed7856b8da6d0bf1e66a358966b2c285eab619a0aae46c2759. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDQH2273048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85beeb3f3252779899f2db555eec2453bcd46c2edd2b27636f362bff260267b8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZDQH2273051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd474a711bf401633bd8ea334af1d024e573e90f8b8217fb0a074db5118160174. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDQH2273056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62946b15a94d3667718192a532d5b154d63af80ead138c8fd7840a7760975a3e. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZDQH2273081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea88d943bc3a809ad5bf6cb6657e3b555daf4db7a0ec0e5376756d7bc5a4c2d7. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:56Z), 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/QZDQH2273039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1326f36064da84ec1a7ccc7fc62495bd36dec2481ee3a694209a085b51f5c41. 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/QZDQH2397020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f30b31def5f120e2cea6aecd97b212f69f3f3ac8ecc97b173f4944ef96f82c9. 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/QZDQH2436505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e049a77f7630f88acc30c7160349d136eed72ab49134a16beb6d48a6c1bd46. 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/QZDQH2501363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254fab836c62b045550ec2024ea7d4d968acd93117060fc6d7f65f8ecd592bf0. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZDQH2501365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381a9a22fa0510f3bd66330de30e4e76a9fec68ffefef04ac510304de63dbe69. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZDQH2501366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efc106b1c9a33e6d39fb19447a2d4fdfed59a8a4dde7163cab3ee032afa4b90. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZDQH2501367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e43b6155bb67ee912dcc245163542367ca4879f50b1ebcb55569d65aa2244c9. 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/QZDQH2501368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aa688b7d9b81fff6186c940bd964015e361e45360357598dbe60134d954d80. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDQH2501370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4828f2d492877b5e753386992e32f6cb433f4ef13e23e4b39ce8e01cffa052de. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDQH2501371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22034eb9b033e2c723d313add9204923a510eddf5fc39d6a144355163707e0e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDQH2501372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5bfbe204e9c0d8d51d8b81064db275f850c323aa59187f299a9aa624152370. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDQH2501373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81846e1b0417398b0a95dfa9a2c458519c323ffe2836b4e7bb4a8088a1607e6. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZDQH2501374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1167aa77851d0bb3d89b75e3aa61d2e0d1b23a03a7b974f6937a2875597630. 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/QZDQH2526609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20dd9578c66b4f2c9ce07b2296ca87a5e9843177fc34fcf06f4743c5a92b195b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZDQH2526612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72ebdbb50702cc5f64e7343e49b0b80239c5c3b73e30a2337b47e05c96c0d37. 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/TCAHU2449382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3945a26e2cf20ded0b6bf18b3bb695b704a7c5b62a93ed4ed0f7753c5faa70. 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/QZFZ42061506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ef54ee79a83e3f68337716d2c00ce783ab097e8fa8ac8a8b6cb11793bdc857. 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/QZFZ42061508.