Back-On (stylized as BACK-ON) is a Japanese rock band from Tokyo, Japan. They are known for performing opening themes to anime and games, such as the Tales of the World: Radiant Mythology 2 opening th
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 0xd87e6c04d12d1bd94be68420efe309fe759ccea36c9567b3276a91c1479dcae6. 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/032eb10e-388a-4da6-9e66-1c05c96b05b7.json and https://artists.proofprofile.net/proofs/artist/032eb10e-388a-4da6-9e66-1c05c96b05b7.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 0x26b583737e99eeed0980c54751783d96176276951e4bbba3bb7dda6b8e45c40c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/JPB602103516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49958a3743af374eafe2d04703763d03f522ed080371b1d3fe023acc04b3d41. 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/JPB602103436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf68f850e05b7e6449e747c9d84168dad02178f648b476f407c1b47e0add487. 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/JPB602102706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afe594eb693e216ec8ee32374c47ce9c5e239555ef31ec8afd69743139c4113. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/JPB602102443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829af9d65388345eaffcb4f58a0cca535a1f91233f9224eb1fd641f6ed02061f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/JPB602103518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5eb5862832dbdfaf5d7daf76922c165122ccfd523bf9e2d7196bee3a5c55f62. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/JPB602104149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afe594eb693e216ec8ee32374c47ce9c5e239555ef31ec8afd69743139c4113. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/JPB602102443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f520149ef23ff7f666a7ff561cd99a9f33ce2e6d821d586b1df83ff2ba346ca. 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/JPB601301280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ca9fda9faadbbd87ab3ceea97823324b862c175118c1c726f8fb91104a9e94. 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/JPB602306859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03ee2fe56729516af2ea2197ffc256c68475e1b62e892a92ce353dcfc0da70e. 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/JPB602400064.
THE FUTURE DAYBREAK - 『映画 仮面ライダーガッチャード ザ・フューチャー・デイブレイク』主題歌
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e14eb4698c24ea73e8a8686813ebf776f829084806b8e5440ad4e3d97461fc2. 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/JPB602402312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd74d1aa5ca719bd736a8eae6af8fa5015d1accc40be71f4b68754ba45047776. 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/JPB602401675.
CHEMY×STORY - TV size BACK-ON Ver.『仮面ライダーガッチャード』主題歌
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b08badbb0378f86ef6a57947f44e308b9a650244edf16b7d7ea6584e4ccd8d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPB602303357.
CHEMY×STORY - TV size（『仮面ライダーガッチャード』主題歌）
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc7805bf75ee395cb78a076a95e3157f8bc5b5b99b3e78f809cbe307b5b6de31. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/JPB602400065.
THE FUTURE DAYBREAK - Movie Edit 『映画 仮面ライダーガッチャード ザ・フューチャー・デイブレイク』主題歌
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bd19d49ff2c358b730cb7d93ff94c00dcaac0091b36a84f7d1ee5221cbd395. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/JPB602402314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x722adeaa202e880a0ce8f494ea83c4309bc82db6f9e5f67899dc690a0be0c59d. 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/JPB602400063.