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 0x855567a583139393701078894c991f30a80a5a7919c5472bdb39a6bf27b4b2cf. 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/05c315de-f5eb-4947-9257-f231f1b70708.json and https://artists.proofprofile.net/proofs/artist/05c315de-f5eb-4947-9257-f231f1b70708.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 0x3ace731192651c56867b64097f42cedba0ffd1bed25743143fce71af1f1c2e3f. 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/BXKG22500601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc018742d1bc326ac16204edac85036fe89dc38780ec8643dd1654f12d5864966. 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/BXKG22500598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3bfd5890d6b60aa70f3a0b253ab78fca8ca35444a466989793aa9e8b216ebb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BK7NM2500179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71301e7d369e7b1a816f24e0157c26aafc97bea63e7b166edb40bf7c92f208e3. 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/BK2NP2500141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62a34fe7da904a7a5ab476988109abeee33f17b0a8374e9c2ab67d11b41c912. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BK2NP2500143.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6824a7b545b383d4d7e7a743c2ee5e0c4cb167026cb8c5195a7d2fcc7182e0d5. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BK2NP2500142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7394938b798b5c15e6b9f024f213cdc1d505a89fd74b283fbc7c38c24fede0af. 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/BCI5M2500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b1c053bcadeefcfb9aa0d2b9dc277879a34c6f116488fcedd5da5337f105c9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AEA3A2521599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8937fecc16d763b44ef3a2fc57ec3ed80d18dcce420e472afcf3e48c08892dc4. 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/BXKG22500594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83123425d21c515383492e05c1704bbb5ae0036d6538e44fe953c6b4ec30a811. 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/BK2NP2500140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc9f56efb0a53dc6a038f7c027dbbfa61134d47019db8606de1a907621c12c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BK7NM2500178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213a16e7593d7b2354d3da562a8a74cdde299a6786245f702004ec625bcd3df. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22500628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc9db4395e2011a64a27fc7cb0e958c36e93d08961aa45e73cb52b0b46d11d1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BKBLS2500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a37f66c00dae536382c5bcf89c23cf16455fa6072ae49456d1977cdc501ea4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/BXKG22500513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5849ae07d18e2a94ece7bf7e5f0d33ad268f28d51ff4d36c29dc0db889723c7. 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/BXKG22500593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5765b0096e5a3df57187bd725a37dd966db9c6d6aaf20fcff485863afaea6856. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AEA3A2531220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90daaaf4491cc018db0c3402eada214140000d89bd5619b5387c8d5c30beb588. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BXKG22500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed74f9176468bb07b77d6dedff8be877e6ddc88a81800c579217cc4477b1880. 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/BCE7P2501694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0002ac21ed6ebb2a5b36d2a573b17edb4f6dae0967967524720bb638f4e0d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXKG22500508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4459f239bc0204b41eda65bad91a16ee71454b76fa30971caa4a6a6129e67ed4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BXKG22500516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcc2700aa3ee14cf528356497392ef851ffc566a88589aca560d80a9af2aa25. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRRGE2500247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad4afe781dda32dfa8495422f75a0f65efe9fdcd991e649941f1bdd9383df573. 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/BXKG22300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cda669c0d231ea46bf0b128919df45a5903cd372870eb08a9cfbf6423286895. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXKG22302814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2234e4730e971ad4eb824b3cb08375d44d4160a0c11a05a64ba7bde21512cd90. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22400893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x075d2bb35bf2ce314241022988cfd1b4dc90d6e2b298e80abe4703678d2fabc9. 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/BXKG22400694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085d70d443b354a1c448d32ec245df3fee1592885472c6cf0d6ea387d39cf79c. 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/BXKG22400692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2e2283f36293f0cb6fbf078db50508c63b23427864ecf0e53e8077afb54e5e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BXKG22400895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fbe65bd10cb902707c23aa153e2dace7647d1957d9bd1a9304f7b89af2de3. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/BK2NP2400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc624bbed3edd329430d57478ef6a53c3a4366228706bcabaf7ec3acdd59bb99. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BXKG22400892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6c36d8c0e5fe67e6aa20613c49599befd13247b09aa4a54cbd8d3d84ff791a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZNJW2469746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030e0eb911b589335426dcc896561e0c7864b1178e6955db39103b930d1667c3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BXKG22401505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a2f23e42ffc2cd3fe5332f92cd64d21dbf8f10b24aaf0795308478fc33a05b. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BXKG22302138.