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 0xafe35bf4a96bdc0709f77b3d27c57cc567bce57741ceb802e540cb4fb779dbf3. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef1f749e-23f5-477a-971f-1fb02f7e8a6e.json and https://artists.proofprofile.net/proofs/artist/ef1f749e-23f5-477a-971f-1fb02f7e8a6e.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 0x2cea7fddfd2c8a09017259a5ba45a3bd6dd6a04f96130d236a8f286a6c62f867. 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/USLUU2301044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94004ce7e5dc43f89ac3aa7dd45e39a26538bb6caf542aa96ddf1e372729d05e. 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/USLUU2301045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca566116675dfd03effb543e9e14d748da26c04512573bcbcc68cd105640f64f. 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/USLUU2301046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211723b8782a3916d938710a4684986b8243a8dd0747fb38d9ac453906ec5138. 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/USLUU2301047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174808e2c80a8810839ff8d39c2537e865b75d30ba45e15b7e1002118e535186. 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/USLUU2300902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa9290abf03b021d0724bcbfb5c5aa1a94aef16913d63396e934db2da703509. 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/USLUU2301043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426d69726726f10c91cdd173f18a921401182df4f6780c12e29ec95e20292789. 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/USLUU2301048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba16d9cfbc24095d29edadc16fcb17d002a5187f6e6be2d57513218f7b0c6f0. 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/USLUU2301049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7003e9d5e0558fae371d25478d6db45ee862e71ba08725e3f52eb3ffda048. 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/USLUU2301050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6efae264c878b4dc81cddff6813f1027371b454da00fd85bb5d299edca1417a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USLUU2301051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58448ea2f2e5122a4750e1b4ff2e460cc11e76ce2f7b464a9cad0a12fb1f28a1. 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/USLUU2300852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f353aee4f99f5ea1b83033e5ca2ef2701b1e3acebb14f22e629b0843ca18593. 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/USLUU2301052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656480b99a16027f382e59cebd16690c33b6e0295a7bf2607be0dcc5a9b417a8. 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/USLUU2301053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67478b423b3bbf86714be0b8abdc158b0804cc00774cb964f01c72a18c5a18c5. 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/USLUU2301054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74ced409fbc7adce4e1030cbfa22a7c9b9f4684f4a416b0c5e6d5546133175a. 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/USLUU2300970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba05ba1b8c406ff1ab60a707dc05c21d9a39f79f660ac727d0c44c61206c336c. 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/USLUU2301055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535910d0c47ac289ae416322afa9b4404a2a96bd6159934cefb3fa5c30072412. 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/USLUU2301056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddb504ca07947b02225d1b3a98bc8b17989162d708f30ce995719fc2fb7dac6. 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/USLUU2301057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e960bd8e82d5c3f5575243ca1814d06abdde1242a436e5902b691bd9c4d107. 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/USLUU2301058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a27a61be69771a9f795b3e9c9eb5d1d641baef73cf6e556df6ab39115da08f. 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/USLUU2300923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6871353d542662b2fba3344b3541069a8b0dcbcbd3acf21593634ff01735ead. 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/USLUU2301059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e802361e7da405de545bfc1e94a13852b9e1d38be6f020a4eace6b7d2369921. 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/USLUU2300926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4515a71df6d3a0e091149166121a3a1a1e2dda635ff98458fc941afe0359035. 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/USLUU2300995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c293e3464543ca3d346ad219bd0171d6d42b12fc61fef24000b8310ca0cdc0. 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/USLUU2301060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1036e1404632120ceda34cb400b028c2f3e2c6896cca94a5ebe7a8b846c28cd8. 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/USLUU2301061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c574f4b59fab149eff7331eb24eb88f859c9a1e5d2ad4c3b996200dfb71eac9. 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/USLUU2301062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e6824968e0595b393a9c5fce238ea7798517c5bbcd84328ef684ee4d29c04f3. 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/USLUU2301063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ecf72f4a428e18f6d00f216a42303f48d5ce044647acaf8c7228a43f6af8b4e. 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/USLUU2300928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211723b8782a3916d938710a4684986b8243a8dd0747fb38d9ac453906ec5138. 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/USLUU2301047.