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 0xdf8df5f83df741565a766cbfdfc0e7fc2c1e6b32bb87f5830570b880e32df80f. 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/ab9f20a2-5281-4b97-828a-44757dc779a2.json and https://artists.proofprofile.net/proofs/artist/ab9f20a2-5281-4b97-828a-44757dc779a2.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 0xd9085dc5fea6d478a333097229fb1e27278f6c178a6359eb977c8636aa80edeb. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:22:06Z), 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/QZTVM2163299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70bfea37712fa60fdc9b14717e7e8a3db6720225fa404bb85ef05e00db35e52. 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/QZTVM2157276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4e669c72e7b29c999710232659a45cff8836041a205b00bce941cd4b2e039e2. 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/QZMZ92277818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dbfa942974ef73f53baddb03baa6068fb961315d8bfaad83ab8c8eca5d9f13. 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/QZNJW2221434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8ea3dd9cc94d752a56baf49a953840a062c0cdb96459420cabf0d8fbab7d8f. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:45:12Z), 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/QZNJZ2226399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414a024079384e66259dbd7ff637f61922531def516acaac4c1023fd9feb10e8. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZW9L2273006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1045f80dccccd7203c9074f3d3c7b434a78e9393878d8ce3ad1eb76cd90d80c. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:46Z), 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/QZW9M2272285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792babdcc5fd0745fdd82973dd0ca305f6940c7640271aa316fce4354c2bdb00. 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/US7VG2358894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbf0dbde492b8464e199378e9fba6834362940c134edd3fe5a1cdd5bb5babf1. 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/QZGLS2324162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978ab917f5727a08f018a250a99e4e3d7795d63d26a744e6e36ac4ea46d9a1f1. 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/QZNJW2309692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7eece81d507e04c640cb79e2cd2914fa543d5818a5781b2fe61c36532777352. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZNJW2331777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f11f7cbf539f232e3c38d2a504048b1315b5393a0137e908c3e9788de490344. 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/QZNJY2314316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf548ebece17cce8156ccf11c7365d637491807cee0cf1b5c47e54641f621e8f5. 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/QZW9K2346486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a41def80e7d38b611e1aad0fbdf4346effcd53cfeabc2481eba6eb5b6d604d. 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/QZW9L2323973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6c65b6a36bb0445e1becd8a3731955fe0e651b9feb88cf9c5bdd6a6f5a1eeb. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:33:42Z), 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/QZTPX2407853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7def2b45b278f467a4ce417e9e9fd7a52f9378b9c6f6ff1db5bf97bf7b3f6002. 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/QZW9L2409754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9acb86024eed464c194d2ebee3789340955c8ab095012dfe92a2435ff3e9ab. 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/QZW9L2409755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9866df1fb656fac969438d2cbfde303c032eadf039576ca1acd21a736a1e607e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:49:07Z), 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/QZW9L2409757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6fb04f029aaf8d834797c61f767a46e9bc810fd27e7ce7845090a678adf694. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZW9L2409758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20585068bca7710de42f320f535d2baa338bdd08bc1c6cd7c611bdf324cc8c84. 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/QZW9L2409759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa0a32ffe94a513b592ac8a893f5dfdc1bb914df9173378a286d46e7d3c77856. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:08:51Z), 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/US7VG2503324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4c4cd4450cb8a960dbdc3ac4df74c9ecefb1dc7af1a3c5848cb621cbed7bd4. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:56Z), 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/QZGLS2585693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec494858d43d9ecede2af1769840109aef4fd15f33ec1f9dd6835f15209796b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLS2585690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddbe2b2188bfe06c6d26bb71d58dcf2465589afb6f609524d618a8c6d281188. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJV2502375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7740a54e934562d9caaa95378ee7e0fd449e6768122246ec2742373398226c14. 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/QZNJY2526741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x098072c113d92349d0763143a85107924ca393ca2ea982080c0f16d287e192f1. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:21:24Z), 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/QZNJZ2514837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8caa27b0612e0005d975a8e90c1876c0b88d892d7a058d75e989ef58ba0acea1. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZNJZ2590378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cbc97108116f5d89be7da446578d8d07fcc2c5bbd64dca74de103342bfc5af. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:02:36Z), 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/QZTVM2515836.