was a Japanese electronic rock band from Chiba Prefecture. Negoto formed in 2007 when the members were high school students. In 2008, the band won a special jury prize at the 1st , a music festival f
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 0x589f0ab3f8c22a4dcfad078d7968fb8b5562b7fa734e87377a9e90bb0e056842. 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/16b223e7-8a2c-462e-b2c2-c138d05430d6.json and https://artists.proofprofile.net/proofs/artist/16b223e7-8a2c-462e-b2c2-c138d05430d6.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 0x2e2b3de4df261731fd284ac07b991aaa544c10e6f2625b52ccd3b195447aba84. 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/JPKS01003181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842aa1c2768643fb93ce02ca17a60c64c8426322e596b9838397eae5e338e58c. 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/JPKS01101102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd321aad2bc57d59e508098e87cd7e2fa1009cfeca7f8d3582fcc522a78fcb306. 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/JPKS01101322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65fd62e913d88e16b82ebe200e22471a1492dbfc1ff4a73a832218b96248998. 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/JPKS01101325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc79a60d7c9468ace4bbce36381c83a4643514c55d2eea2906c05e5831ead46. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/JPKS01202261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184b00439f588ed44ea002e263d5394fc050b590828bfc6d2f45d2ff4f78ed83. 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/JPKS01201961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb351e56053eb1293a18bc611179fc8ca4604f19459a2ba5c0a01daefd8749770. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/JPU901401366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1bcb9d8ac8c910a19d6c46d4927d5f22968b7b0e27e54c643f8ab4c8f118bf. 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/JPU901500280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8455ae378a12a6a6f882e9308ab041fdc002e90a6b3d2938a33f8867250bd9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPU901500284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62610b5623611f347992d585fe851dd390ec19f44f04be9c94777719758be212. 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/JPKS01400089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95f69cb48bf7c23af89a708f8d1fc4461b83aa52c0ba9fef3f3412f29be68fc. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/JPU901604030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5321236c9ba65577e00ff094934fff481d6c17d503c341eeb1b8cdff379ccd9. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/JPU901604032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1239663f8fc52ad05c864a6696d4a206cd7db197dc39eb65989ab09283347ec9. 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/JPU901604033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b93eade61b16390159b3c9ec6200335c01ee1a6b51d3ad69d6a993477610b7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/JPU901604035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8ac1a1dd423fb8d3e3052d0a31589458b2050ddb1a7cc3ad61a4dc29644281c. 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/JPU901702258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ffc7839dcf0f4fa5eae8ca5e3b63d1fffc417242ec41a1cbbb7f64829f143b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/JPU901701693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910df5b24e0debf728a4c630fb9c17f83a46d938d13640459f5a10770b895309. 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/JPU901703406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efde87faf1ff08303ac6fe313985b6e33289e3060f50f01f10ca84854619fdb. 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/JPU901702259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b651cfc1d2a63a079414dca2bbfe72ec8c7382af6b12c0f95f952b8f6a4e52f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPU901703411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe477705eddd4a7739b5c0843c54a5af2f14696bc8c464315de10639c2d19243c. 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/JPKS01001882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb0600466cc2a1a247b0aea818c2c3ed840d9db8a37ec6f27819ce11c9c4010. 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/JPKS01003182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd31d1ad999940f25fdb40ce46f45ec9ec09be19c2b33a2ac5a5628e116598ca. 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/JPKS01200161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6ca510f63859f191d7f337e01662d0e9b3fa1a85f86c9f0becd7c57ae27050. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/JPU901900914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e38d428eef5edc70c8182db6e6861409985b589aefadb1557644cd636ff5ba. 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/JPKS01200164.