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 0xd3eee4a6ed51ec912bba2d09368f660585da845a86768b896a9c5ddec4965e33. 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/c3c318fd-6af7-4f8b-a5cb-5fc24f05d345.json and https://artists.proofprofile.net/proofs/artist/c3c318fd-6af7-4f8b-a5cb-5fc24f05d345.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 0x9c1ca5f937dd80dbc8eb4d69749a0b2151813199d91721a412d0f4169c1a8e4f. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/BRSZO0000843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5184bbdc7238edc8d5ccb9fd5002a9a4323062c0afcc86e5883bb793eb113246. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:28:18Z), 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/BRSZO0000846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09c66c72cf745ef47dba563dff84ab2f6e88a78e8fa3a41a4e75c0c6fda6301. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:55:18Z), 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/BRSZO0000847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f00c8df85cef2a211dc7bce10c2faa5bf67b8b31d5535a6089f141118013dd. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/BRSZO0000849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e0578955bc4f90fafde50bae2fdce796cd7f067daa199dd82b76f5180f47f4a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BRSZO0000855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f8bebb6847afdfc7538eb64758973268ca7ca40171b78b9b1a6ad882779cb4. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:25:52Z), 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/BRSZO0000856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a39f09a978ba77cf23dd75bef252da766befd948d17376311b563947a5298fd. 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/BRSZO0000858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6543c0f932b79874618c2bef6bdd449d4e9c3ecaff3269768a02a377d929f773. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:53:54Z), 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/BRSZO9600056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cf675fccb150ae62be21ab1ac8b0503e8ea8d9096fa1691fe3caae6939c00c1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BRSZO9600058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07456fee970b69164357c6a9b6c6e5600b3ca105197d7d09cb3163ae293d3f1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:03:07Z), 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/BRSZO9600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830735c146fb0bd18411cc75658b8b2711065d71cb099bf6c88cd40accb54275. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BRSZO9600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb012cfcfd7f8c891672f08a3b25e06abc37ff9810c9d89386e0ed5840515df. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/BRSZO9600061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3435db852caf1187222cc57fe82e160abdf1fd8baa0144c4693d395c55cfe447. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:57:09Z), 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/BRSZO9600062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ece827445a01a44b3b6c2b5d7160d7779d51f8cd5d261527ae66d394341f33. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:22:22Z), 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/BRSZO9600064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744b7d7c2b8398ee5651101fddf15cac9da99eb7ad61f39a2cb193ff21c23d3b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:51:31Z), 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/BRSZO0200133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532ffef61d740ce746bfa8efa14b8988fb4e1eb63464daf025b14729f9316c4b. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/US7VG1962946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f94e6af0ade6b47c4df1c24dc3aadf4c9fe0601799b49870f7e3e030ae0b8a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US7VG1962947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fc0b29aa95ff5a768fab8d4fd31740c17926b76ac1098d15fb2c0d48b856300. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/US7VG1962948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8962950b89b6174a8cbc2f0ff39a75ea484b9ba1c93ecfb03e3137596c001b93. 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/US7VG1962949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c3c1e67672006aedffca09c84b9cde8895995924f4ce632e86a25525230dc5. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T08:36:33Z), 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/BRVKC2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b5351575850d1b962bf8c06d94e1ad1f98fbe3770b6c7d5e81e05d287fc51a. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:30Z), 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/BRVCK2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0a73b003e2813ebe8e896694b4d974459ca619a95c37ba348122d57c8789c6. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/BRVCK2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c7c4e771f4eaa1b8e05d9d2378dd41ad70c670635dc1ae4e084d71c22b854a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/BRVCK2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7b85d8ad3ef6efd0251adea64174f5fe1035b6b2d4cc75ea9083d92b8b807f. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:06:12Z), 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/BRVCK2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55d96e9f742050c80318c9134a74101b5330f9473c60c044edd0a476eb11c78f. 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/BRVCK2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1abc8252b04e41f34417a98f626348e51a2f2809485e3cbce45e719409f0f5. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:00:33Z), 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/BRGRV0700048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d403179a370c073c9957f4ee97740c076f937a4906adca4477c333c10fc05e9. 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/BRVCK2500020.