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 0x0a1ef4fda042bacec6fed1cd2e8b5c561114ca7e18dc03cc6e6e78160f26c4b0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41ef904b-8846-4d06-95ca-5a3d03e18cde.json and https://artists.proofprofile.net/proofs/artist/41ef904b-8846-4d06-95ca-5a3d03e18cde.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 0x2abace897efbdca523c2dd0528a2dbf059fc3bd0086433942e47d59378c42121. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAX2480999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083006394d71839864143cacb5f1aa36b385309ae6b136cc0668a17176a597a8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFM2477369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d381454476f5a731a9f65a6b130feebdf58ba90e878faee3e991233a7bfdbb. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:49:59Z), 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/QZWFT2495595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847d502364d9a7f56ab4c888bf8c12739ab736b3a8e18b523b427ba627276133. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:20:24Z), 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/QZWFT2495603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cd16c194463a373ea9cd0e599b2e3c964a55775aed4a2b844cd1020e60ff6f. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZDA42574435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad434e0ea65ecb1712ecad5b28a7befc737f8709ec81caf6dd2eca7a38014e6c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZDA72569138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9da2ca82e98e4f6b0a86dd760c2e94994fcb5c73b5b7088b761737594777d9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:01:33Z), 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/QZES72514541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7979cfd5a1c3114f199f5ffc0d1075b7ba6a1d489892289b16c2fd5b9879af. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES82507963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ec91de660c72555e62a70dcfe7a09a7d00bf36877d69abb0a8b05258864514. 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/QZK6Q2566889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0fdf07f8602e86af0a8a3150e9d1efc2a5778222839138af1047e0b3eda3a5. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZK6Q2566890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26fe5891ef3566d2aeccb49ffce4effee29d2464b969f5a6256490233f98e7e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2566891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6603c57ddf299056a9fc15ee57e4f33542f92a10de105beaee59936aecac1bc7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZK6Q2566892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1c03515e79a64038856d52588d38a086b40c9614131733f3917b4d66f0cd9b. 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/QZK6Q2566894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cd16c194463a373ea9cd0e599b2e3c964a55775aed4a2b844cd1020e60ff6f. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZDA42574435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672825bd751715c18e7de02e1921f784e2e5d0ece1680a0ba6782c9f632081be. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6M2581914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83829f10f0c70263ef55da1de67581169f6c0f20afbbe37498ca80c92ffdc86e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWY2532018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54894d98f657ac303fc1404344a3a08e07f1f9efc7c1ceb59b5c73a2536f992c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZPLR2516516.