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 0x8dfad8f87a9269a4d5889ecb01ad70daff169cd43b7342b7ff7de9585383c443. 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/7f675153-e892-46c3-b355-a79463f98e80.json and https://artists.proofprofile.net/proofs/artist/7f675153-e892-46c3-b355-a79463f98e80.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 0xb6b51331f3dcc55bbc7a33071ba1c56778326ca60ebc2feabe007cece42539c0. 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/HKG731686114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fc9f604f084127ee06727051038e76f33ddeb9aef9a526316bbb3b1fe94bb7. 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/HKG731686115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5344d3173b611a02f478a373f20b7bb4b82a550ec91a5ac8b2648ad41eb75cc. 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/CNUM72400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1092f81201ee5df11f2d8bb106daf97ba1d9b3fa140f98b7decc6aee63ab3949. 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/CNUM72400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1effb981eb29bc38a35c948d1d4b6570b315052c4042c75cb1cfc47415a73391. 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/CNUM72400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9927dad764566d7e554a3a5db36c581b9df75f65cbfae5037c72ce7f805c544b. 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/CNUM72400258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3212baccbafb35527e46b92744c2535452cab801ef705cdb7484c0e1c3691894. 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/CNUM72400259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1092f81201ee5df11f2d8bb106daf97ba1d9b3fa140f98b7decc6aee63ab3949. 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/CNUM72400251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe0ee910ef40dc138791d21c0bbac8d95f52f81c5df0be205d76b8a18e586a. 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/HKG732387967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe0ee910ef40dc138791d21c0bbac8d95f52f81c5df0be205d76b8a18e586a. 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/HKG732387967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ab58ef6a97c8b9c56d2d56b22c1bb40c55a59d96e346207cab0ec9f2ae6a34. 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/HKG732376057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5a68557264256946f2b27d9cdf427abaaf8972b4731ef8981f7f231a14a0c4. 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/TWAE32401401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c15bf945dfa398e93042a8394e3dfb99b1120729d02d72f42a55c59b5030f2d. 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/TWAE32401403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e71c47b184bf9cc9d86f8b80184beedfd06ad7245b1445e8a9cf07cefc70ef1. 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/TWAE32401406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c32de81b8bc63e5b2befca7e0b6a386e52efed7e1232f04c1bcc10155067007. 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/TWAE32401407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5769644e6a26f47828916849a2e56212efcff54b503623fb5da8168e3ff095b2. 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/TWAE32401408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c4543c8ae54945305df08c0ccc4bd747a384f57fda1ce90e8e007d5a5207c4. 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/TWAE32401409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e39a454a591867f491abf1f26d0b4b95dec4fb6cb72c00a0d7b5b2989f51818. 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/TWAE32401410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b215b91a69f1c5ff120d47660b5b393e3c907dfd74e4e72ce71dc60b93f15f. 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/TWAE32401443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfced7609f8efc0c1575caa460ae7207e63f8ae6489b4b2bd3bd0490ef5bb166f. 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/TWAE32401445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ca188a9b4a46f4ff0110c087dc9e158abdcd3cd31022c6ded3df10d2cb7801d. 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/TWAE32401447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa875f3bb4b373a3c040761d501fe5d5b2a0f9e90e5d4f0636034b89117e06cf2. 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/TWAE32401448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14828f6e191ca0ea8f221ba9960afebf0b493db6d1da2bd6338e882fd76a82d0. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/TWAE32401449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470db8f4c686e57bac056ac0984693fee76ce554b29cb9c87c9de1bd2d56b0eb. 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/TWAE32401450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618d33a781411d2a270955b8f804ed3880391bf3b6bb83f8b61c8765ad6da700. 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/TWAE32401451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6944b703567b4d2972f9a8705e9071c01f9b2fc62075257d804c1da5b3c76f. 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/TWAE32401452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6dc7062e86b64b5c7c017155737bb894e7dcea325588e0ac835aff6064e9e0. 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/HKG731678396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca8c2aa49d91f4a71fe5714387bc533841eb83ed56a3f47e7da37242b4f6532. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKG731678397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0690cc87c8e5cf64fee69f643a324e0f7b8474225181d8524aa353b28d694caf. 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/HKG731678398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bb862f0b1bb813a60f1e233d26ef3a08db3bf1b6866ebacedf8e702c7889b79. 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/HKG731678399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5dc2dd88afbc7599edd43af4cdbc005cb9997e4185b66310a632a233a8799e. 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/HKG731678400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1181e3bbe1091c37a1bdcaeb4068cc10780624637fcede6f1fbf56e8e84d9c0f. 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/HKG731678401.