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 0x811d572191845dd094be2988aeee6eebe6c26736d8de4db68597ab998dbbfa49. 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/03cf7500-2d55-44ff-beb8-a74d9daaa9fd.json and https://artists.proofprofile.net/proofs/artist/03cf7500-2d55-44ff-beb8-a74d9daaa9fd.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 0x301abee5b77ff460aec9200828d2f0fc32dbed35338f6e901bc9893c70a8623d. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPE562117323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f4d424c24cd3d404164c3a455ec913f7b4ad01f9d1ca3199109b8ad9e41284. 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/JPE562117324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768952fe2d5f799cbc56dd67178cc2c2366c16bb8e3fe64f39e75d38eb029d68. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPE562117326.
あなたは世界の終わりにずんだを食べるのだ
あなたは世界の終わりにずんだを食べるのだ (Self Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e409bc543f0766808135822b0b021956fe877aeaedf43f44e448cd5c0985b51. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPA652206082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e409bc543f0766808135822b0b021956fe877aeaedf43f44e448cd5c0985b51. 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/JPA652206082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154e3cec4212a37bd8db3d17755b31137fa3beeee6e1f6c3f16af7bc2da38385. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/JPA652306265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154e3cec4212a37bd8db3d17755b31137fa3beeee6e1f6c3f16af7bc2da38385. 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/JPA652306265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acdb9a74886b4445cada4de43ccb6a9ef594e811c94a35904630aefc5f44f9d. 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/JPA652306348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340ee564863eb7c5f00c5e2f118f08a159b6f35dfdb3591ad97d314147055e96. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/JPA652306350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e409bc543f0766808135822b0b021956fe877aeaedf43f44e448cd5c0985b51. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/JPA652206082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340ee564863eb7c5f00c5e2f118f08a159b6f35dfdb3591ad97d314147055e96. 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/JPA652306350.
インパクトずんだもんぬいぐるみ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c34390e55d5b8e871bb212eeb176c274f37b3bee50aeba69763e8da5ea571e5. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/JPA652306351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e409bc543f0766808135822b0b021956fe877aeaedf43f44e448cd5c0985b51. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/JPA652206082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728f2b506f434bcadf747692155e94370df069ba8daf27e437bf96f0c0dbe93a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/JPA652306486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a23e6cfb29e1f45b9c887c08cc516768e562c03b14f3bae4e2a7b17e445163. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCJPX2315434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a98a3c0a55bbd9443bf0cdb07e07bc7890dea002e0ff903950e24d9ff7947d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/JPA652309675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a98a3c0a55bbd9443bf0cdb07e07bc7890dea002e0ff903950e24d9ff7947d. 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/JPA652309675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08344ad6b0307313cbb919fb50a504a22db9b94475df6dfd7be224cfb04bbf07. 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/JP92Q2302116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f68cb05c71d6b15752c7b052b75add5c7caf7b158b6e94658158858739f7c62. 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/JP92Q2302169.
あるいは地下鉄の私 - namigroove remix - (feat. 知声)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7066fffa23c53686c404181dff53f191661c342f4fae6c7df9e5817535793d. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/JP92Q2400129.
ずんだタコヤーキ (feat. ずんだもん & 琴葉 茜・葵)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd849ca675dfaa39cd4c67259d44cb057fbe83c9448fab91829e401e033e0d7c9. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/TCJPZ2443074.
のじゃロリック (feat. 桃寝ちのい & ちょこ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5989b3fd213a0112355771e620472b61b704d995c7d2ea1198df97d5c00b6e79. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCJPZ2448837.
のじゃロリック (feat. ちょこ & 桃寝ちのい)
金イクラぽいぽいな (feat. さぁーもん & ずんだもん)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f0e31c022365167b11d8d45e16b8d1abb64f3df671eba04b0a9fbe1e12f27c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCJPB2450837.
無限ダラダラガンダーラ (feat. 琴葉 茜・葵)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3fda8c5048315f9c18a6fd9556b24b491cf57c3a9ed2259df4a15ab5a3eafb3. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/TCJPB2497579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a5abffbe1e158e09ff40b7a906e8087bd642328c9c26b14ea049e36a1597cd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCJPK2534793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a5abffbe1e158e09ff40b7a906e8087bd642328c9c26b14ea049e36a1597cd. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCJPK2534793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd99b157f9873b057f1b3b12b96e5714deb78be3df603b64bb4c65d652e3744f. 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/TCJPC2445124.
ずんだバンド 1st (Live at Youtube Music Weekend ver)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77aafc105d298798e9536eb36044192a036f16b49d7c3ba319e0bc82e6776ac8. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCJPF2568430.
ぞんぞんずんだエナジー (feat. ずんだもん)
Zunda Band with Wotoha (Live at Youtube Music Weekend 2025 ver)
ずんだバンド with をとは (Live at Youtube Music Weekend 2025 ver)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ef72f399d29a2c691cd1c94e88bc4fe47c7014410c3868aa82c9237d1d020b. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/JP92Q2400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3b0243110d19832bd099ade2ecd687def519970e36c57c9c2021adede745c3. 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/JP92Q2502312.