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 0x9e2eee745ded4fef37da35af29cb06ad393c778b852a1f63f739a54e53aea78e. 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/442aa268-6540-41c1-8bea-6eb37f49765a.json and https://artists.proofprofile.net/proofs/artist/442aa268-6540-41c1-8bea-6eb37f49765a.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 0x6ebef0cd4ca2f8edadae51369356af164e167a4b6658d17736f1822d198e9245. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:05:08Z), 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/USSM11501503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1742cfb9513dc6db364268e29c509d75941d1c3ae8944e85629a7712f54c39. 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/USSM11501505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2a55bdb365ca652e862732eebba9ab1875baa3c377acd456af4c4b73d9b115. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USSM11501507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb0a47844b657bb3db7485bca701f3e5f48c9eedad100126a9a34bda0eb3d02. 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/USSM11501508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef172e18397eeebf2d20220b390a9fe57a5ee9d773605f97bbf92ac21576904. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:14:52Z), 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/USSM11501509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9007df1b36419c9112e356d5738568d2d4a0435ce050e3e90307c53c2143c5b3. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USSM11501510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341a953792425a7773d5012c85232b9935831d0df148c362f21dcfda9912824c. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:17Z), 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/USSM11501511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d827f6f8675be96637004ecd21ba33131155f876da41ac875286c17f797c93. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/USSM11501512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea949528baa54027404f32349e6a8423e9a917594f6305f3ab3cc148770e6a9. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/USSM11501513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec197b39a4ea8c0fe3b4daab5b113fb444e57e7f2d523b3883ff97839dac1b89. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:22:15Z), 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/USSM11501515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219d5cb25a6bc1ae8a8a1641c709b32fd2fa4f86b379d71f7e8b87d84b8bbc9f. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/USSM11501516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc338231094cb023b112a1084cc81ab8be98cdd82c3627f8faa493640347996b. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USSM11501519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321c606c97cf7a6c7b8c1a478f5e704e060144e1ed558bd6028ed636e4ef0010. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/DED831801677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4892e25354b61ba0ae1969c32abc62b606f4c6e054c1a0427e8aa20d2b33c81f. 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/DED831801682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeabd5a6afd1080dfbc5d0e4926048d6776ec3f5cd928c205f373643f1ab5808d. 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/DED831801684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3a1d6233a482f68b5a101cefb770fdb73da11d886c2449ff7a48639d547573. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DED831801685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ad34e31ff55ccd07ac651a236b4535755c22074b2b2f15b7e3e78aef01b609b. 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/DED831801686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf5b9f64ed20233b9afd0f13c2bb0c949c901603adaac8ba669eddbd6252337. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DED831801688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc6178b17d70ff45635f73c616b1461ef556ce72e537b972c0d0250b4e8489e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DED831801018.