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 0x1de2ebdd0b079ba812e497a1f008a273ae5db82a52cbbd0767d7e6081abb8d25. 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/fa416435-2e22-462b-bdb6-8b2748a86bd8.json and https://artists.proofprofile.net/proofs/artist/fa416435-2e22-462b-bdb6-8b2748a86bd8.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 0x814ea86933f605195d54664ce01413bd26703e9924b6780ccb2d6117a1fb6759. 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/FRX282231019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb01e40114acf3f425bc930adcd375e9c2c3b3ab05a525abb983a7dea459762. 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/FR10S1971232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1feecd1fe78ff708745ed4141e25b09d215ed4d47c00d935319031179e84cf1. 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/FR10S1971233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10652c03aee7bc87b4316bbf72133e4c97c991f67de2cc6edac39d942db7aa08. 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/FR10S1971234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff83b22231a42d9c1dedfc3ca0b9285c4e2d940f5ac05465f68b71712cebc3d. 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/FR10S1971235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d8c60542c4e826611d336b7e768a91e0158977ea5426d1cb425d04090a56ab. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FR10S1971236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd28da22b7a61aab15c5301b91cf26ffec6fb0e6fb7ac5a674c6eba49411af68f. 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/FR10S1971239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88587a52460308ea8279bd60c19ba07d22f6e3a8a89c892e329176943a411bef. 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/FRX871579878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f987679d2ca69ba00f0cddac9067b78fe3686a80a2920254ba5ea5c123814d3. 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/FRX871579887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd033af2e20fb1780d86cb6f47df6da487905e6a6bb130472631fcae6691c5c5e. 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/DEBL61450959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cba27492e1701e7fc8c202b5011dfcc4e8d525a47e0c035630748a8c551a23. 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/DEBL61450960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a44879ac11fd440aae34ccb1b965c00427bc2e357f23e362badd6bd55b09e6f. 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/DEBL61450961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed69896514132bbafe97fffbf9545611e4b96e3444f8c3f141d8bb6b3630ceb. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEBL61450963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8113781b450cdbc4b34364479bf8cc31aff2f0422f0419dc2c237d9eaad0ffb4. 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/US4E49994101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e110745f1bce01790ab728ed4321290c4dc28e58fe2f2cf57707aaddcb71045. 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/US4E49994102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e01ce51e1fa13108a63f083aebe7e190ea0933525f48143f29c17256ae95bd. 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/US4E49994103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ca9d83b9f4291cd01b6e1d3fe91e3c8d61d6ded57de55a53cd5b1933bb3779. 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/US4E49994118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afb9427aa52e8c522c1cbf42c88e5ab25344bdd064a109c68da920d2f56f901. 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/DEA629761330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755611bd0f7d03e7323a83b62baa17ef86eb9fdebec88d3ba4adb1172247f91a. 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/DEA629761410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82eff43e3376360e60b482a480fd7e01a2a76fc0e275ba632cb100c6b84378ec. 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/DEA629660450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906bae6fe9f98769cab50d44a9e87793cde95889725e28a5556ffa7f2f6de07f. 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/DEA629660460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c58c6c7099718405e81c3ec9bd8789b213c9d3e586ed4f32f4fedc6f8e340d. 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/DEA629660500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb291e02979b03bee504d7f839f04b2e9699e5b0441bd4558a30a482bb0df2050. 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/FRX872119521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24655b30c9fbac85d2bf40873ecc0fc9e7306985cb4a19bb4649ceaaf2bd12c. 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/FRX872119522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ce3d281154a6a6754f56a7c9ca4bd9c1cb4b7dd019fbcf72d193c221a0742a. 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/FRX872119524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd944e909a2f0bbba37f690537682f4e8a2af358d4e8d154e88ec7562a0e79cbc. 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/FRX872119496.