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 0x04ba8ed113f22bde92af6d5b6a06b4e18430ad6c3f6eff279f023d4a3401d493. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/71b15480-bb1b-48fd-84fc-14189f89b822.json and https://artists.proofprofile.net/proofs/artist/71b15480-bb1b-48fd-84fc-14189f89b822.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 0x226188a7db3363f3818ae2b429a8b2d47ce139859dbc0a3473703119c3b7b75b. 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/QZS7J2346221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674c5e9a60990004155ee402ddf56c73022a5cc92767ff52b148a0d15982053a. 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/QZS7J2344895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac995447ee9dca7e768bbc9a14fd3ce26b517c4544845354eab1b4eb844e2ac6. 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/QZS7J2304042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6345e2d61c18e383873f3fe781f1072754af1aebaf7729709faa504226362e63. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZFZ22196486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1eb1dbe4a583094b2c83c56f2366aa264111c4702f93cf5c04b517ef9f956d. 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/QZNWQ2110838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e925694eb6d21769af4aa3a94a8a7e35310a19b7e27dddcd935972836a3301. 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/QZNWQ2110839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa190d49be830b50d2173987d557622851fd5db2cf085d2efde8142da7ec51e9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWQ2110840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2aedebaf28ccdcd27cc240e441082ab4cba0949b31610ce551de610f333c19. 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/QZNWQ2110841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81a6161955195a26a4cc6ae8ac3a9f9fee7bed9ee10b137bf721474b96d9241. 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/QZNWQ2110842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa976e140660ce33dfa79f647fbfdd25290b5111ebe47291a43ed18adcaccb7. 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/QZNWQ2110837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc912164508b13110cd0f2fbcd5987bba90272d397b90f3d39f7d2df9428375b4. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWQ2110843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x924492120008989e377e892929fc8b4b73ada3d65d17b7b4af97850fcae49598. 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/QZTLA2551796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7431a280a36f3b507c29d6f6e0f875ff112ceb0ef2a9e7aaaf79d56a3f8048a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:46Z), 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/QZQAY2550781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75f27d059370cecb5d88923d2cb5ae9d3a043caaaa35294dfc6e0bb7b9996a5. 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/QZSYP2472175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989609eed65cea44010186f30f28395ed1057c7350858f8457051bfdcbb19f0f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZS7J2395720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91ad7cd8c1fa66e56894af08f23013de7888a03fb926e3911f68774d49a8fae. 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/QZS7J2300987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dda252c0774389b9921ba319175c714cb0d7bd4f346ac7fd3b488d31a9f9f52. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QZS7J2378517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd435585688a76ea73c5d1e1aca9fef2422148dff498442d8f07299fed0271d4a. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZS7J2369729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dde3904d817ec2d45fd119f4a53ba9b88debd01b85609167ba7c680c3e4aff6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZS7J2333213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2160a891944eabfcfb32741abc5c5055809295e29753dcc77a7257da70e21e4. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZS7J2380876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c33a48feb3746615fbd373c426553b72ad56951343d5ff2ea65e92183402e6f. 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/QZQAY2398498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1134110d0923dd4e92e903489cb0f5a33f8e6f1d1421efd52585b284a805779. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZQAY2301347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8a3a53f67edf049b83497727f377450e5df68e1862b46db315565b4c09b888. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZQAY2369892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f565416fdf9a34b9e0f36254b090707273673ade3ed6c140b9bd332a88c57a. 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/QZQAY2334968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275e9cbc232fa7ff96b9a1da345ebebf7595401cddb1d8e8440bace064e7397d. 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/QZTLA2338552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3666a9dd28d0e6320044cfab14f0c2f53ee65d976929d2d41e5796c7bdcf0a3a. 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/QZSYP2334126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bde29f4c82a53809e687d381e275803de939c4de2412d189313693fbc203cc. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZSYP2315799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5844dfd433c52e0a5998f22c080d4085084ce780b6e31ea2c8b84a60b6a59d3. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZSYP2366781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f318ae6ac82743d4723c4ccca098b06462fe647dddf20960f5232feb071862. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZSYP2385211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3dda8fb42d7a1f0a6c9b04727283578a8db64db8c8a873a2c75846c028ff24. 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/QZTAT2212830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf55bb6c43a41dde7f0acef22483b8e840e7635bfe3ec1cab575f55a1c8b3377. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZTAT2212831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd363e633af1caf6e5de8ee56eba4cc36ff567a33353707f617e7f2ffd3ed380d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZAKB2159640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2e679fa8564e773dc66582fb1fbec238b877a224418df777b98590df9a15b8. 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/QZAKB2159642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162b8fe9467c86f6b2134f005b326fc6139a7ffccd48eb0d5c79fb54291af25d. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZAKB2159641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ed274151a18e73e695e9239abdce3c0fe0b3306c3980e00173c0c48cd4d67e. 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/QZRP52435945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x130790cefa26e3da5a318233d76585b5e92e53b41ee72dcb77ff74b578c431a5. 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/QZTBD2413249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f6555d405cdac03cdb9f4ffaa2677134e1496d5390b262b5d33b006aba2765. 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/QZFYX2380625.