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 0x0215c5155a2da3a6fc14322d6100ede45ac9ff0fb80de84474df5860d0c3bfca. 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/2ee73e3a-e467-417c-ab19-3ba0ec80c2b2.json and https://artists.proofprofile.net/proofs/artist/2ee73e3a-e467-417c-ab19-3ba0ec80c2b2.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 0x920684d590cdd460087c3243794691b12993c89f368b0e7e2985033bb953b667. 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/QZTAS2195154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61313f69ba4acd019d535af5d5f71471dfc22c084d7c8f89662f0d1a3637d5. 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/QZTAS2195155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be02a967e12cc80e673b31855269c3a870495da4bfcb7fb49a6c0fc31478632. 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/QZTAS2195157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09787e70c365f4d920143c11b659164afb802080d195ca41bc1ea926bd74f38a. 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/QZTAS2195158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d86db8f8fea79ffba463db2a4ed1a874cddcc5599a6bf25a89de0647a9abe02. 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/QZ4JJ1972037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e01c0325645369027ba59e659aa6fe1c7229ae8f8273ee703ec10b619f5a60. 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/QZFZ52093092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1968b7a3b02416d42fcd78f3466317372fb3bca983b9efff3b7b33f0db79fe. 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/QZ4JJ1972033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d86db8f8fea79ffba463db2a4ed1a874cddcc5599a6bf25a89de0647a9abe02. 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/QZ4JJ1972037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2d67d1f80ace555a4217004be1537a1dc537364536d36b45541edcf19ae51f. 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/QMMUK1600471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9debe76741804a23f1524457f5a9e416642bb64629addfe0b3ecdc5c8d9bb03d. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QMMUK1600473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bef2027b7275e50767316864dcf958d1d1508698fb97e1471e5ae53b12abfc. 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/QMMUK1600474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda88fdfcb92b56b4ff93182587d308625eb9c0ad739124258ea974230a08e74. 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/TCADH1722587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d93e065461d00a43a79e66e4f8e5a87462e73cef21f6aa2596f095185d0cea. 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/GBWUL2408219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe42e1c2a236109bc594fd0d7186b282bfaef9f0141b19340218b491c88942. 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/QM4TW2435119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6af326502329b8490f49a88a91053212e4dec88c5548bc13984344db36bd5f6. 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/QZNWR2302174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331486ca0be842057d5489bdee788bfcf63530790938ab8f118748a157208f45. 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/QMFME2231416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe42e1c2a236109bc594fd0d7186b282bfaef9f0141b19340218b491c88942. 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/QM4TW2435119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3560869a9b57d68910c902266aa4463dd2931a76f6191b4da4576bf0d49e194c. 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/NOK9L2303070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6af326502329b8490f49a88a91053212e4dec88c5548bc13984344db36bd5f6. 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/QZNWR2302174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44314f8f793196f89fcc0375bae3466e729fb4b0244aa7d4d3c08acd49518b24. 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/QM6N22328129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331486ca0be842057d5489bdee788bfcf63530790938ab8f118748a157208f45. 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/QMFME2231416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2204db7e14b6656fbae2f76434f8d80c83a4e176ad7eac7a92740d8f9b169ba9. 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/QM6MZ2218615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2380a447c8171f968e95b66c95a161975f7d38b0c713a1561bb45398b1819. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAFF2004355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad6acf2fee5d1579f16cd2120da853e7638e5db24aea9963b2dba60de577c45. 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/TCAFJ2147931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7cae9ebb945e5508a6fb45e3befe745186bfc04e8827edb82b1653b193b9d5. 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/TCAFJ2147948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe93ed3494124a5a902f97c3280988135e67bdfcd57fece5f4d822b51f40e0ca4. 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/TCAFJ2123280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc2380a447c8171f968e95b66c95a161975f7d38b0c713a1561bb45398b1819. 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/TCAFF2004355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1ca853c2afa14ad61bb1f974a97eb355df1a04b5dc73f6d31a613c4fcd26603. 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/QZDA62069652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e01c0325645369027ba59e659aa6fe1c7229ae8f8273ee703ec10b619f5a60. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/QZFZ52093092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f46e234a0eea6a40cd2045da04c757e5c7a95b202fd831fd348fde4e4c6b574. 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/TCACN1615820.