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 0xd55065b3242889d26553da56711778811a784a8525ec9dcd436379c6f37e8fe0. 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/11a41522-1176-4660-acbd-b4241af6acf9.json and https://artists.proofprofile.net/proofs/artist/11a41522-1176-4660-acbd-b4241af6acf9.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 0x1ce7805c860d6cc4502f25e2dc24f2944a88c88573ff968487302659ba1cc7f5. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/JPJ901004330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fb0138a73fd16c8b683d2532a13d498ba48762fa428c4b8f9f8b3841046d45. 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/JPJ901301810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d28f56dad5673f907f200beb8d7355d53c77d9df4cb3859e783f67d18d96869. 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/JPJ901401670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d8e3bae196d47928c7a4f20b6f8019da037084f5ec3cf584b42e2446bdcb26. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/JPJ901503290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f48e0447b2a603f7b6ca24002c6faa7a6cd8a1e6f5a1b8c3877477c6a144f3. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/JPJ901503310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f63d87059ef5105a90af0eedaf9af33dee3085d3877df58336bd5d6b68272b. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/JPJ901603710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7098d9f3cd44d57dbf2348119c1a2dbb369ca375c6a0978720ba8d16baffb73c. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPJ901603720.
お弁当ばこのうた～あなたへのお手紙～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9badd40f0c7f841672dd714c53ed653a02b6932d9ed7383f34826647350ff4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPCR01700400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3b7c124a9cdf6583117d06b355d35ce99fbddae5029d78d19e4226acf725b6. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPCR01700430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502a1de852073c5e7d52b0d97308b8c2f05c36e471958a56d1ed3036e0d6800e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/JPCR01700390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb6ea2f0e340e1a511e53584c842db0988d2212ddf47ad6c2e327a1d2ea0f6c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/JPCR01705390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7003bcbf8953dd437568ad16b6c7807df7207d3061698dca15401d69a31780a5. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/JPCR01805980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c142526275653f1f975233b38f5a32850214e047a5e1cb1d67a6f97d0b7d65. 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/JPCR01901260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb3a73571edf02b26f1ae4b88b7fc2d052708d1a67994d7339d410f3b889c23. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/JPCR01902990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c38a476672915caa5249680ce4825f8acb8c8eef71189988d41329b20fdea42. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPCR01903010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450811afdaffd308f34514236b01ec504449667babb0d88130eea39bd775d32c. 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/JPCR02000810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e6e93d203478d4ca07b282a66081a2d92564fa358e9b8a791e0ecbf4879d60. 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/JPCR02000820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f2337b85c7b4def979b595189d6783ba7edb7dd3b67d5dfcc5ad6fe41c52aa. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/JPCR02005280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8ae7cae1c5db52d24f25bca8b1306fd085e00b40926d29b8343fc28e8f8f9e. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/JPCR02005300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a1779101ef6d37007348c962743148f13ca26083fc786505580f7eb0ec304d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/JPCR02005340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb78c196d2bc062f53706090add9608399f69499bf0639f195455fec9a46311. 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/JPCR02005360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086944a7d191fa54cff306baa17e34f95912c9cdfef3f1853a67df52b9370637. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/JPCR02104860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2f62441c1dbe51a205c45b0b0b1b9052b2c3e53f3bfc6b7e3879115c47874d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/JPCR02200840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc7b172f5e1110d597e07896004279954d1e2362030b453e111a0d305bbb88d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPCR01901270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e97e7e316473f4c803a4c8582e1c74273f5e2de9874e29437cc10bd2b4aa08. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/JPCR02200830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cca98c226d3d9904c0153d28782737246c06a12741072797ac190c928e7475a. 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/JPCR02203240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f1bb16a21d909c58c8af3cd9b65246342b3f98d804d44eab7270c73dacac0e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPCR02203200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7acc43c45677f10a3f158b37ca318adb8dcb6229a8f439487aaeff7b629eb2f. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/JPCR02203230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8aef704214c51eae9792409b7d8d5876858166bdabc02a86e6f9c599a079f72. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/JPCR02303950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82c16729743cb1d89d94641bd77993d5eddf7c1786ed05f12be16bd36647a25. 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/JPCR02303970.
大家さんと私のブルース～困った時はお互い様～
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d9f01adf8d18cd4f6022cfa08db66ff5c299947ee73dc8fcc5acc13fa153d0. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/JPCR02303980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fb85ae96116328d70b2be00689f0403c4bcf49056431232cfa81898075159c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/JPCR02303990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23792ba4e4649a4042d6fd72ce95283b10692875e67131e4a96e8979649d31ec. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/JPCR02304000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9fd4413455beab5d549b3dc47b57b5e3f2068360f52327052dcc2afe9d551c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/JPCR02304010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7f8d23c7401f07a103beff1f7d6bc654c58b23fadb46769fda9881318d4ad3. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/JPCR02304020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086944a7d191fa54cff306baa17e34f95912c9cdfef3f1853a67df52b9370637. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/JPCR02104860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x613158055b41edfaceb394ffac541262a7efb6a9e04a18ad303bff7099463b33. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPCR02500360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c06e1a6f755d4aba0a8a4ee6801774f6bb4b4507ed9308d7735d42634c047a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/JPCR02500370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1bb08dd1531b4902972d03a8dea41907a2899a9c7c717358b8a92a90ea9e8a4. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/JPCR02500380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88746c5440ccc0d981b48251683b01ebf0ee3d861abea02aaec826c21436a6ca. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/JPCR02500390.