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 0xfd83c4bef8c253cf817bedba3b6b201e8cb2fa79a5982c6f112d96183fa17e8c. 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/2d6cc41a-ee2f-4164-a2f8-368efd935b02.json and https://artists.proofprofile.net/proofs/artist/2d6cc41a-ee2f-4164-a2f8-368efd935b02.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 0x29d8314270daf904aab6daed314f533d2b0c182a1984bf87aa0d21a886a2b310. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/CH6542048955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d597e3a021251710b7e18ac430e17f133c48381d494ed18510984ed90022f0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CH6542048956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6b774b8b89395824854791d33bc1dd1a8560f59713d6cb2443f433145527f5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:01Z), 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/CH6542048957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941ded58acf3e333382114fe095ba67e75bd5221dd16d365d92778bf88f80bea. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH6542048958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2712c702abe261af4703a934d60b889c8fab585738b5077d54072f24cbcab6a0. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T04:55:29Z), 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/CH6542047004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c292a6e4bb21baf7d28b5639e3e1a14395d523d0378a13d66343ca1d948ae. 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/CH6542047005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3049eb6006380ba3393f19dee4c02d76458c9aeb954e5cd219e808d1c7c93f9. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/CH6542048959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b9946f0db04eca9f42872e70453128b09fd0c043f8495df4260d5897ae67c76. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/CH6542048960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c79a9e413ff3fe2af7229b168b06b4c0d437c4de69ef78376df7fbf8cb4efa0. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CH6542048961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b1f429d2e3bcde525b523e0df71f6065004ff1c737ee26d530df84d0fcecf. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:33:22Z), 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/CH6542047006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5447516e5991929225243491d20dc1666aec59f435b526c7390266507b726f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CH6542048962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16580ea7cf31bf73b586cb15bf862b56eadd15a49b7309a180e673b7a88105f4. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:22:09Z), 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/CH6542048963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43dbbc1197a98dde7b3b67147e5b25a51cd3ae5dee4f1aae08fa2b648843fee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFC2046843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05956422f5ab5f6da0789d012ccf2395d07faddd6e81f5f69f13a5c2b1ce2139. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFC2068284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe54a981be8446d6ad49c7691711dc7b6c175d97f9d0239bf455ef4f4e649d5a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAFD2021969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ae890e96bc28dac1a2093db65c9c2df8db2b7d8182a32f0d84e200ef37d2b3. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAFE2032173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcd35951642ee645fb603db5b6aa8340a2d015169790e3e9dec509e9ef6fb82. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAFF2030788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5410a8c17135cca09dca401cc724f11bc3bee3fc5f9c67cb82f449ece07ffe. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAFF2072838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ddc71f2322b5b335312241b690411c1e4ad1b076798f8dce8bb24776bf2b9a7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAFG2021873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2747d2af23be563eece5fca65864539827068a7e05bbc14fb821283188d544. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCAFG2055885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd591978998f9ffe3c81d234f856e977d394c17befb7998ae086cfa2d5fb08495. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAFG2097170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fdebef329c0b2bc2ef3455544c43d80109c9a396ee33ef3c178bf99b9a1ca2. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAFJ2159312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a4d8df3db6287250c01be1908117b1d56a195126c3b0415d534fb9a64ebd27. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/TCAFK2125531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ae629ba51a9a808a1d686a57defa184db04ace876e9efb61ae5df89978d9a7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAFL2105562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69243cceacf08b7fc7a3ec7d5c356c05f3d5a7478efdb4bf752090c15d881cc9. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/TCAFM2115107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0d711cc05682ef53079bbc7ce49bb47005494a59ca72b7b8cbb5234fa7ce40. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:50Z), 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/TCAFM2171814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bca41ab632f6124692dc011dc09b72f4a0f967a7eca1f6d1b89428ba8a0817e. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFN2166974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed879e3624f6c9b84954ba3f3633d01fac772c8129604260a69bc61b64d5fbf8. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:25Z), 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/TCAFW2149644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16df25bd69e46af821bad1bc77d9101ff700fd8b9a9c73071bc853ceee128924. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAGD2222735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493803ec791e794d59c5f3e02543a36ae4a0e82a2cefbbaaab4a9abd48359695. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAGD2222740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2971db818155cc0324dce73221a249bcf4ef7e205f535b422f34e72cc50651. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGM2286762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f99f6d623e2e4dba68347ecdba90255603723ef60f6d446a0605f9edf5acd72. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAGM2286777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78fc3a1ee98ca69d9eb3682deefaba327645a7f3dac56902be5497d1c08591c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAGM2286779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9dd815175d25a08bac0fe1741cc9f329b5780406ac17b97b82da34a0d39c668. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/TCAGW2304172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb12a8ca15bf196e3ac5e0988ca962dcd6777e560dea765c1398a8666eec26c. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:03:48Z), 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/TCAHM2307909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2df97696a59abf9aa540680a0a96c17ab48c5e5b08bbfcbc124adb0ddc95092. 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/TCAHN2322933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1827233c0838dbb0f4fca0575bee664432715c0461ecafdea7853b9457d2799a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAHN2373455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521aaaa0a277ce4ecbf3ecd0a96650b44ec3f5e15de31db5d236091edcb720b9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHR2312813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf828160f2efd9033cf24d1c098158a98979b3a968175010e3fdcd530692855a8. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:57Z), 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/TCAHR2312845.
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