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 0xca2e8522aa3ff31afc88345a78943915d0fa35f33e8bd09aefbbc0a12a6abae3. 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/d1df7ab8-c56a-4f6d-b129-d982c841c8c1.json and https://artists.proofprofile.net/proofs/artist/d1df7ab8-c56a-4f6d-b129-d982c841c8c1.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 0xeb149b89f4dbcdb01400820a91524a134508f426bcb0970da871f2ced6531072. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPB290803802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dae7151d4d261d527aee56f3b34e66e2988e12fab70a62d9aeec29041dc43a4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB290803806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb149b89f4dbcdb01400820a91524a134508f426bcb0970da871f2ced6531072. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/JPB290803802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb3ab8c35af0761cab77b4fc279323bc1465d3dd61dfe8c3d50f622720a1550. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/JPB291104501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac07760150b50a2a890909df8ede07b42a7864b057280059966f934c7006ade9. 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/JPB291104502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe819e64e6a2d14440f94bbfd4b85218df04d7a7afc208b045edd95aee1b52c34. 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/JPB291104503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b788dbdeec0482b9f5e5d847c2c763d5a51908f7bc3e065b0251cf00df8465b. 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/JPB291104505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17043fc5e2656b88ed6338acae4ba0f74cc3e52af79969bc642137c6f69544de. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/JPB291104506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4afedaaa893bb1c9a2056ef6a8fc946ddb124c70680b67d6ec7b734e493b2f9. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/JPB291104512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb3ab8c35af0761cab77b4fc279323bc1465d3dd61dfe8c3d50f622720a1550. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/JPB291104501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135976f8ecf0a07e38a302cdd26f313a587c076145ea5592bfdd15d80969ffbe. 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/JPB291304802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243631c27ed73aea1837ef16dac99c85b2e4b20fdb30fb2e901642672556409. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB291304808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0fcd09725e4ac13831df11528bd9a52a7e4ceaea8a15456e06b45d2e92ef31. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/JPB291304806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2524616c1b06f673e9f2ed803b5caaa2a627204b650467dcf84aa5447d8f7a6b. 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/JPB291304807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d32ffe96906d7ff3e6e28853b21759feecf44b4d4f95980c338735794c2210. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/JPB291304809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3291968e8580d103b0b6e579a6c9fd2d129ebd5b5a7742752bf116a98aa99a5d. 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/JPB291304811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135976f8ecf0a07e38a302cdd26f313a587c076145ea5592bfdd15d80969ffbe. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB291304802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc243631c27ed73aea1837ef16dac99c85b2e4b20fdb30fb2e901642672556409. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/JPB291304808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0fcd09725e4ac13831df11528bd9a52a7e4ceaea8a15456e06b45d2e92ef31. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/JPB291304806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3291968e8580d103b0b6e579a6c9fd2d129ebd5b5a7742752bf116a98aa99a5d. 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/JPB291304811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f7d6a495dd7bdb1fa0ab8918ceca1e4d5d5506e37250a83a04ced8db999ced. 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/JPB291605003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c80a9784a411996c0930cb72f918f695f1d204fc75ec415e9c5085df97badf. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB291605005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775e74820e9502f432e67b019b8eb0d1aef6da0dbc78ae8b89ffbdad76cbbd5d. 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/JPB291605006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f7d6a495dd7bdb1fa0ab8918ceca1e4d5d5506e37250a83a04ced8db999ced. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPB291605003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c80a9784a411996c0930cb72f918f695f1d204fc75ec415e9c5085df97badf. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/JPB291605005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775e74820e9502f432e67b019b8eb0d1aef6da0dbc78ae8b89ffbdad76cbbd5d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/JPB291605006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe8eacad89dd0203d283f4104a79eb3a51568b67f7092f30cbec5f0f08b3289. 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/JPB290502005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe8eacad89dd0203d283f4104a79eb3a51568b67f7092f30cbec5f0f08b3289. 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/JPB290502005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d027b5e6609f0dafe2ca87cb2de5f5b024265d07dcc37ba0172f29716ebdf8e. 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/JPB292105501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eec0821e90bfea1e47a05426d030d33677b14bd57a52af6719cd84234e5354f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/JPB292105510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef58c3fe8563f8b8912d364d6a9dd804ca7e8391eb26cd5a38faf46940fd3d7. 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/JPB292105511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443a5423eaf61cfa29a3bf3d49596e38ce8b5abacb5335ea3c706cae0b414467. 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/JPZ922110147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b482c1cf19752ff7c1764a96e2a11d835b9be7dc1251d5414847550a28f5914. 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/JPZ922110151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd034f3050765bd3d7ae93c560db644773a84e1aa79f904d32eabe0706c9901. 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/JPZ922110152.
Toumei na Nukumori (feat. Risa Nakagawa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bf9a260d9cafcae7a3da94b2e3ddca0f28503909d35326e36960d8a7f980c0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCJPW2361082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86bf9a260d9cafcae7a3da94b2e3ddca0f28503909d35326e36960d8a7f980c0. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/TCJPW2361082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2f2e89e221b2a346d91da7b8405e7b1c5ab768ddfc11da4451db08352e5424. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCJPW2361083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e872c681583410163e07264ecd9d0e1764c1b3846629c4b739cf7485e1cc33. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCJPW2361092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40222c8c60133bb369204d34b072e0b8889903a48afe3ecbb2acd0c055d2c7f5. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCJPW2361097.