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 0x259ac75548c83c7eac367e830bdcdf5e9ade8c4b71dda1cff99d7d119eefab03. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/272899bf-1a09-4d33-baef-43ecedc401d8.json and https://artists.proofprofile.net/proofs/artist/272899bf-1a09-4d33-baef-43ecedc401d8.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 0x3bf9133332c691e16ed1078a334292966fcd70273ce16628fdb127985a9a23f0. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/QZK6P2165743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901100164dda5e27c0ddb4862c1faabe1ac694524bf32b1adf68a4c6de524789. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6P2165744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25bd91cc70d6a942d59e1ff8257b11f0f6ccc8a68c50c08a605579d8af7b36cb. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6P2165745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5cc47068d7128d0c9ae38b73b00276920bd08b88d741c3fb4cf66014574aa2. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6P2165746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf21363188a1073c9c9ee438a61639ec398599d84919c8ae726b042cc12974c6. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZK6P2165747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f51d475c7fdd168ffdb14864c43a6662c694048cc36909a98080d75a9dbafa5. 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/QZK6P2165748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc336eae158ac2019c3145111714080c5e3407565bbcd22c5e60675eec736a38. 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/QZK6P2165749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc53fbdc1d909e33eaec140352bdfa6f592ac1408f2626b26787b4a14f5e7045. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6G2125836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae36f6544117a51c639a70dd233ecd45a8890542637f69c5ea1c5c9bd9f9b56. 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/QZK6G2125837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe462301a69fa56b2d05175e8fa148abbfbbd39a7d995bc87710a6bc75405125f. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZK6G2125838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe153a5c3c342ddee7e631e883a7a1b9e2e04455bb6b042d8643ae128b72a037. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6G2125839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf69690605aa9d6194bd8110ad9246ae11ff3d2b0e5439596630dc078b428ca86. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZK6G2125840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be3104731646d9097f54e08ea4d5336091eb49e46e60a32938b1d2baa80e750. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZK6G2125841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a0062606e5c2cdebf451852ebb57a10aca0cbe3e07eaaabfbecd2c661840dd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6G2125842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bde61755fa5696ae220600a6e56f4e83acb814d0fb0cb0e0bd41a0d20e6580. 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/QZK6G2125843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363552e6919940c2e3e2d6527827e34a7d34693c76ff97c168c1a6d320991df5. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZMER2163329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07015f0770b300fa13baf0eebf45be9abfa4c6cf6782d1792bb0bca930b959a3. 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/QZMER2163330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58545117500151e6fdfa4ab386f3b0657091ffd7676a6ecb220801598707baa4. 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/QZMER2163331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe250073d68126237195297665947f0848e892fe38de8c6a0d4b13c425de0e59c. 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/QZMER2163332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8f3e3d8795a5e697aca9ab3085d8fb5a5d1fa17aa8cc06d3d4cc5acbe8dcbc. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/QZMER2163333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6572eccf6f4010cfd868fe82e04d665a6145bdd4b890e277a20e642ad7e07a4f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZMER2163334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf711d966d7efc72a5a1521acea46b0dadb2fe6ab1eaa8ce2a31079d8b09be677. 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/QZMER2163335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92df92f0deda465d50beb749676cfa6f5dfecb34ad96ce3d89f499b5967a6f06. 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/QZMER2163336.