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 0xa0704fe62117e7fe68dacb56b61185a6aebd4e9715db7d0550c17617de0959e8. 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/4f533f1e-7a43-42d8-8de5-941be86b8b59.json and https://artists.proofprofile.net/proofs/artist/4f533f1e-7a43-42d8-8de5-941be86b8b59.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 0xa5465d21b0d4fb8cccf6c40611b5398037f52cab0f11b568321e125bd3014cf6. 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/QZNWV2239081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d9c86687b29ba570bb4351e6fbbbaf0e4e3e3564e945c9323dac97c7d3fa17. 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/DGA0H2445754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bd773c790b6f65e9582ee5c4d31efb85a4b5e0da8d81bbc6289e2ebd14da4d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DGA0P2437083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f44d85eb0ff32369bca4f4d657f1ea65fee9b8b376fe6ae74aa5b455802d385. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:57:00Z), 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/DGA0S2411772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52d931b51b3de3df2f2dc4075365021fa02990a024ed7298c4c164cffe0b616. 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/US3DF2500102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3316047f4d52221cec91934cbfdb74616f1b5c5c0ab9776f20f7d0ed57ff04d8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/US3DF2515829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876104c21d29fd56ac4830ddbc021590984f612c8c3503319ad6f963b5c25603. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBKQU2509369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b5c62507690497567e4c1c58673bf10ccbf8b3265d3b3c17a2561c852abc2a. 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/GBKQU2517343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970db6e96eb1391ce6eddaf1478ba073fb61449dbb7870f97cd11dbf5c7e4e69. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/GBKQU2519745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e58ee761fe4dadd066b318025199f52fdbd0520e6145c7a353bab7667c2a0e. 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/QZVEM2537672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7f9ed4cfe04ca90279e59830cd46922235501e5bb706ab3cc12cde0239818. 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/GXBAV2166519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aed2c2a00fe8979e5b31047932e769463155b5a3764920ea4f4a4c7a94de727. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/GXBAV2128994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1f3e4dce2a1b8814691edb3396ace91b14526d3d89c5df4424aa2f2e8ef9dc. 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/GXBAV2174179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadacf13a8c29365341498a4ce185b49420890b329b76957e85c8a89af9e5cc4. 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/UAKK12100089.