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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a7ea7d36843306a1281f3f22d7a6d2e394d31d050d88993d46cd0ee02d1626. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6167afc4-98f2-40f8-a035-180e9f16c8ee.json and https://artists.proofprofile.net/proofs/artist/6167afc4-98f2-40f8-a035-180e9f16c8ee.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x868db93c04120c6c102c6f8bca14decb1dd827e26c57562f90938f8ecf97cf95. 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/NO2DY2300608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0240f98ffba41fc33fb90504b44478a7e789a9199e6d63719cf0e774307b96a7. 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/QZTAU2323982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3c6adc84c99790157b2aab48fbe7a1d18932397a1a01043aba0a81d9cdd49f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NOWAT2305200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a90d24aa841a39f2c7815ec9858503aac7d6389dbec064e3c61d901b6da3c87. 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/SE6A92338323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5d3f1f06493256d9a29b20e048f44f5c404e6b0ee2902906891aee679473ef. 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/QZTAS2319954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053944add5bf149b5ae51d58c74357dc5f1d88b76acbfda1630541eff9096d76. 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/QZRP42347894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71623e44fd3e6f4831995e4e3d2e5195f48b8f5a4273990d6bef216d65108b3f. 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/QZNWT2398088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5cbf22dc33e383c19c1d0af4dbca8f0362091eb3cc4a8b25dd55acacae6494. 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/TCAGX2364997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94f58be4bded45c31fd07e18bd9c86943cfc6275f082ad1afcca197a1660a03. 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/NOF182201130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8259d25f8dc33db0e21f214b799862bb6186ce42bc604ad3951b83db5db4aa39. 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/NOF182201140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95b51b812ba3d09177046d480763876d9b3acb5c5e953ede19498a2696736f1. 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/NOF182201080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260cf33d43ea50829c2755c46a591e90d7bd280e9fee9abb0dc770a5b328261d. 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/NOF182201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed701ea4c2aba40ad9c1b93a78803932d23e5c54c58ecfc0772f8ef42d7d2c3. 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/NOF182201090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ca363ffe1aceb52ab3d6bf117ea9088316afdaee5a33e61d99fd5c63e55dc4. 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/NOF182201120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb7c5a94fcb41aa6a0553029e818ad16a9bab1d6aeeda807214f165d2df09ba. 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/NOF182201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c838ef857518d913420ebbcfb832282f8b14a53d45af8c32817fcbb7905ff92. 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/NOF182201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fe7235e839a3bf5263ef0146564a6514855f334cc1161ee78e008d39fa8b5a. 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/NOF182201030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef96ceef041f3e307c32ee9aa4d3b5d51152026ebfcbe624980520e71df8959. 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/QZRP52196517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14e87d7ddd7f367c3227cbe946bc1a922a24bcaffb31174c9407042bcbcaef9. 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/QZRP42165090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b645ae7d5550fd67ebdaade064cd69a8767a1ef9c1e20a43e6c835a6d23e84b. 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/QZK6P2191155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce534b9cbb7b1c430a0a456f754d87a6958c594ca18a5bff8437e41f512ce1e. 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/QZES62143008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf89f8bae27d88f4fb1b6c81526ff5e5d9dc979802f7c71f8e04defd6dc40f1. 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/QZNWV2058104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4892803290fddd350ff8d67fac9e2c44f060a84c2d7c02ebb09ee21b76832d97. 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/QZK6F2039315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6726df5f036f57231b1b2e45eb7a45b490febd5b419d4af7bddb2fbcca78b6. 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/QZDA72428527.