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 0x1d448395f159efb8cf552065a7ad5b3cf16794b89da82b8bb4fc5109ec091bb7. 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/db06819e-2a71-40f4-8c7d-3a91cb4728cd.json and https://artists.proofprofile.net/proofs/artist/db06819e-2a71-40f4-8c7d-3a91cb4728cd.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 0x7224184fe67e7cf88d3a519c77a1c27a9dd9f3bf23e41e0ed493884f2daf5db9. 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/QZNCS2492330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd99ec94da1cfb1cb33deb7cf553cc9bb6f5a0d6d8a65557ea87181fbc1f61f. 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/SE6QE2430325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afca78e66c33c9ffe56d90808c4b488b9d9e057dd283cba7f42babe1f7c3105. 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/QZTPX2419333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c21d5da1871aa5bd9aed3a787f96547024801b41c83618d05367c7389fa846b. 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/ES75E2406976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0719cd98739dba80543f237de8c34bbc08cb42a5e320d7b851c45f8d49aa54cd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES75E2406259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa747a8ba23371875ce5456bbc13460bc8fbb33703cd776ce523bb677c27ea926. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZNCS2459542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddf99cc426ee85452b85d8518c0c223c59e9af92f3700454c9f1dd9cd2411eb. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/ES75E2403454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497e5a706ce2a1b9d23f8524238c9cd7f40811b37474464c2410609da0d3884f. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/ES75E2401657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8617004a58f28a37d1722aa63b9f9ab6011bac6947003b9c19f927b2fd50ac03. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/SE6A92393983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7610e27485e24bca63219f9ad1b9a46549e46ef3aa323337c848a19c60e457ab. 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/ES75E2400448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba3aff93ebe364dccb45a289f433a759bfc1fed75a882de1762dd5e50b46522. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ES75E2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6113d86d339483ce476f3bd41388d2bd6ba43ccca375217c25df8dc54d2c3f6. 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/ES75E2308408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff5ed914e74901648a19df187cb604826a362e6803fcfde5991eb7ac0296a01. 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/QZW9K2361290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ee428a5b50baea4aa2401b5b5aaf1c63e00de4a16095287f7b0a9e9160d82c. 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/QMDA62331106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa504782d2a1d9f9beda73412bd9dbbde14ed5d57bc8b9fb7ab8e3b55c39eaf8. 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/QMBZ92362914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24097ffb0fe76c92df19c21e38f577e90db5f5eb719bb3afd48f7d636e172c7. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZMZ92364488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602eec69ea673dca4ccfe49a30826e796412a03d239f08df3a9c2f07021609e5. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/QZHN62366718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469c5a7a7d7696e5e6cc9a261c3804dddd68ad3655c75baa5b675c0fee985af1. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTBB2228004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526e939511012fa2a54eb1b8bfffe7792ac0c3d90b83abee94e96899a306064e. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTBB2228005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8293790d6b4f44f9d193125dc565b5d5e5e83e33e11d096f10d84f90019b6f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZTBB2228006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1842a1d3d1634cf2b63c3ba470e7fab179b21f85ce38298cf55a33bea1d5b6. 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/QZTB52229407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe641529854e59f062cf8a196f1c7e37f4ec71b4c8e32df92f5f6bbc1d477b601. 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/GX8KD2237969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978beca6886ff6ed0d39c990acc18392798d314be11b76b4f6b6549a0044dc0f. 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/QZNWW2297519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c997cc5429ae0320f26ee46f227e9dfd57f1f8441a0ea2269c4a7aec7532c45. 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/QZFZ32539344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7cf6dca700c6cea0c092df0e2a0bdc1502b7c0a975d3e8f94c9366b268222. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ES75E2410806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d490ada657ccc4a91d261b887aeb960a7d6b8af2a158cfad03403d7610122c. 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/ES75E2414785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0dea927f3c3ce503a6babb5dfaee72d9e1287258ccae1089aaac116d60cf7a. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ES75E2413911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde856ff213e9f96a59554750675c9b0db49b7843dbaaa7dedc19ac7180a56e3b. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ES75E2414786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c61085abc79a39cf1e38e834244fc23b508164d771e155574e3d5434c561ce. 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/ES75E2414789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe539ef1a49b86e198e0903993386accd41e8e21dcd6c23098a66b7898e35a653. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES75E2414787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf7bb803eaefb2c38875982f981a46d8cea7c20e160d8338adb7474dbb83b11. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USY242415673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819508c88fbd5650b3a622948191ad4b92818c0da939be79aa125fd2288cb9a0. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USY242415674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf749d2d0399a6e105788f264bdb5dccb2619ece3855259b71529de9b83da3d4. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USY242415675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b10e6432f53d8584eb9e4d065812a04e8f4f515979503fa3c0827548a359838. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USY242415677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664fecfa0eaf40ff47d9a490c411e943184d3df332f6db8e6a00cef760dcfdb. 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/USY242415678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b0a227f5da8d0dc048a5cf7f39c4dbcfed99d92a2b90f1e1fe3a691bc9a077. 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/USY242415679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a58117208bbed4a62b0ab61ade7b2d080faddd568a36bedd8a3482182d3b18. 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/SE5BU2583544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0dea927f3c3ce503a6babb5dfaee72d9e1287258ccae1089aaac116d60cf7a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ES75E2413911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc51f283ad4419804c2c7115c3a21a1d356d04d23011aa8ee8289e9f74a9a6c45. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ES75E2412848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df7cf6dca700c6cea0c092df0e2a0bdc1502b7c0a975d3e8f94c9366b268222. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ES75E2410806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e31eeff3f1af37b1248fd869d4469a647f41b5238e234e199ba4bc047fb09f3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SE6HN2432234.