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 0xd4df0c5fbd0d6367e1ba8cb0875712ed3e3eee996dd1a2e1d45e225d58f3bd8b. 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/6f859518-83ef-4abc-a2e8-ad14d373a947.json and https://artists.proofprofile.net/proofs/artist/6f859518-83ef-4abc-a2e8-ad14d373a947.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 0x59734beb886bd2b8eb58fcb0e6ff8142c26b9e9768d3d707a8b92deede5b80ee. 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/NLDD62300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ff29eccc00f00240b9b6fc4bbc141c9375c7452eacd3be042a2758875d115f. 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/QM6P42130441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b5bec47a82318c515f42b8cd6dc4a3269f38e282c4796207a6cbd4e633c3f1. 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/DEZL42301751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18915bcb22507f9191409e767fa89adb5e264b56b1230ce1db10e1f8a3194029. 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/NLZ542300541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3eb60831e1803887e7f22449df509577450d125fd17abd1665df2a0eeee680. 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/GX8KD2373466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc019f90fee3685c99bf7162b7398f76732a032a813143db501952f11428db5b8. 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/QZMHM2389922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49cfea370328b27bfefa9ee4b6f5ef8036bd7e9cc1c4ca5f787e1738431c93b7. 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/SE66N2262646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54afc22599fcea756542b0657dd0cc3f8b22e5429d611beafaa3d64f9058f6d5. 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/GB2LD2210371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e29351471032a75c2e84811943c0829ec25d7b1e3104f5486e617f75d5d4f7f. 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/SE6XY2202364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd246af34e20410a25659213210213d5ca19cef16ae529f9105c83d2633d6d0. 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/GB2LD2010137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd29a29c20788231acd7cf7e0e2522783a3f092e3c24af413b039cb7b5589a6. 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/GB2LD2210299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711055d28633be8c21e805ebaafb238cccb03eb91d5584ac5ff21b2e0c4b4b2f. 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/GX89G2221709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e90a8ba6f444778973ab8b56b1456f9c8d643dbff1f0e7ca400019a774e7da. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/NLT2H2200276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5259ffcdebc1dfeb2b74004284b115ac04ba3f7bf6ea0cb23145f91f511bf1. 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/GB2LD2210061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fee82ed74f7520b155f2e455b8c4841468285d1f207007c1ddeea4e08315cc. 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/GB2LD2110309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0085ac8b614e4bdccf4a528beed596ad4be67859b065981c319f520d1df7cce. 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/MX5332100112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe088bad9d3bd235a7a4ab900b2ea046bbada728c5398d235a13784703d3bb575. 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/NL1ZN2000631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573b3b7b1e31eaa4509d6ccdaff12329d446b1d570c38b22ee56865bc233fbcf. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/US3DF2083763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd246af34e20410a25659213210213d5ca19cef16ae529f9105c83d2633d6d0. 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/GB2LD2010137.