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 0xeb8cad8639a1cfc99ff24e86ca9759bfc372ab048bdda3d0eeb80b75206c9edd. 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/a867c7b3-3864-48e1-918a-4ea846bda59c.json and https://artists.proofprofile.net/proofs/artist/a867c7b3-3864-48e1-918a-4ea846bda59c.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 0xe610470f46849e715e1dc88dbcd2f737ee2e419909e38736744693571b3360d7. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZ8252219109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1ea3cf716ba1969e9ee18998fc8ae2f8bc9604dd797186e887e39cade7d43. 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/USA2P1612180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582ae444bec538af20ec5130293eb3a75d46ea4e7ade26fc61746618d3dcf5c9. 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/USA2P1612182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfea30993c72aedf4b15493c1a76e92f1dfc56502f8bdadef805d3cac9aeebe. 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/USA2P1612183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41aa6333dcb6689c7424c22274298ee7c830f9563a0a57fc00ff1b4fb9423b0a. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:13:50Z), 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/USA2P1612184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd83c0218a7c007b342e9370042238e8d806c7ae42a0314fc9135068b91010c. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/USA2P1612185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3a6e1cf59399fceb8d0b90fe8d4f47f2c73bb0c298ec8c762b189c1f0036c1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USA2P1612186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb5ce9f2ba7083ae0ce99d1c622b453ccbcab65d186183b8b291509ca4e5460. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USQY51701738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfd04d117805ecc518a16ea0fd2731da2a42f65abd4aa782308a3bf0d9e7c64. 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/USQY51701740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad04a41aca72f7b1d40d149198ea0bf48a8c8a43fcd1461ad26c47ccf8eb1a3. 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/USQY51701741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c3910ab73a24ae2d4a925ee0fd4b7805796d5739342331cf3b672114656c41. 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/USQY51701742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27819570b15478784c3c5ad1a13ec1e16110802b0772d4475034be19955919d. 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/USQY51701744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51277efb89465cc2b8d682ff5da31c0e15fd0b6a3fa419868c1b1a176d81c09. 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/USQY51701745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6c6b193a9e906412d86101cfaa9e893c3adc86050830bf53d7d25ce779b922. 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/USHM22027523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296e84797e7bfb008dd91ce435e72106b1915e98636e9a48997337dc987e88cc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM22027524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7610dfb4d1a0a2d58428e657ef3c2b918838c5521265e004249d38eda8f1789e. 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/USX9P2096739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003a9aff9df97f942a661dc931c724c95cf126a2b6bb4865c163fe5004ff6171. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:38:49Z), 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/USL4Q2197135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5ed87159b32e8efe97922163fd3004b26e43a2bb885555fa66f0eb834681c8. 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/USL4Q2197137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc541723f2392c4053b0230c91a3825633d766675de8096ae19c07143ecc692e9. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/USL4Q2197139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f3e8f3839e4f02bb3210bffb28994d7099cb4ec35ad6da781303a096360d21. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T15:32:09Z), 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/USL4Q2197140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd846131fddc9985170ffba7f901b7153e27b3436f921a71da11e685a711c8e. 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/USL4Q2197142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98db194ff085d5fe224e0cb2dbd7f071a13759a651c9eaa0db34608565ffb119. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USL4Q2197144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe752c6a7bc97ae672f9d4ca409e4ca5805d9f32444198fcb44d3f2ce9a9c9546. 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/TCABM1332914.