is a Japanese boy band consisting of four former Produce 101 Japan contestants. They debuted with the single, "Uba Uba" in September 2020. History OWV was formed on May 25, 2020. They released their
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f62d3db2b9afd941f0955d5e93b2ceba57511bb0273fc9a4aece19d6a96c305. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1eea47a-da18-4597-88bb-068857dd93b0.json and https://artists.proofprofile.net/proofs/artist/b1eea47a-da18-4597-88bb-068857dd93b0.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968985f04ec79095c40e154d8ac8b30f75fa3a005656af39ba2e056308c5925. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/JPPO02001929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0d7b684499214f55ed639987bf39bd93193e5c62130affbd1af1c8be65ce64. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPPO02001930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0768586428901df4ca8b23fec940869955247721d8a06f768a4c337805a7ca. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:50:39Z), 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/JPPO02001931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e637dec5b389c7808c29c7ab126dbddb314163d018fd2e99acd71d1a88f315. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPPO02003689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8bf0834f830857e070496fa6ac872440639990e183a8c9bc2ec522d3c0eba9f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:08Z), 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/JPPO02003690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58eccf1af5fb632b92e1a37528bab87cf4eb698aba41bbf5945f8a9d0009e9c8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/JPPO02100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8407d0fe89feb2277b30f1bbf9c75ddc3dee0834565f511fa81a15e72a3037. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/JPPO02100231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9196679e906ed444740ff0ae3c2b63075c4d56af599ab2fdea329636957b62f1. 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/JPPO02101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9fa282ab9738064cc9bfb9de8a27908a40befc203ad4e0e94b07ec555ccb4c. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPPO02101004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7104bbbb460caf57c3e20f8161f120c6252c6b7c10020b746c27e562d2aa53d. 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/JPPO02101005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb581defcfab8c75f66f9a03fe512ffb6ea0c76f2c1f1d492c099ba3a01611328. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/JPPO02102612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4097433b887c260dacdff0747a5f923d7aa66559095e7871ca513d6c7223db06. 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/JPPO02102613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9196679e906ed444740ff0ae3c2b63075c4d56af599ab2fdea329636957b62f1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPPO02101003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e95372e4fc0b1f4651a009bbdb4fda07ebde9b71bc1189a97d415bfa6e48297. 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/JPPO02102614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb464fad1d5fb28fe5c98ca7559152ea65cc679d6412b11c037191241625ae1. 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/JPPO02102615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb41aa7a2d41901c59ab62ce263b22247e0924d5dc921c9bef621d40963d2fc5. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/JPPO02102617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac962363af0efe1fce93939c758292519f80ddb66b2199c06cc9f3026dc5650. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/JPPO02200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac962363af0efe1fce93939c758292519f80ddb66b2199c06cc9f3026dc5650. 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/JPPO02200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4d90f6b2b28c5ea4b3a8d94ede795ff107b224afc5f5af9b5d770427f225a7. 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/JPPO02200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa240bca2c4c02008b581880e35abbb4576d37e8c55776fb4be7d36c22d43f8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/JPPO02202367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b00e9d1f0faa770d666a769c56f77b1e89f7f8e4d247526286bc691b5208cbd. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/JPPO02202368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3459c41e5d5fc3aeccf7e1110a3a38ee1afc5fd53f8d1615e8145795e47a9dbc. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/JPPO02202369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26ab9f691fdf0ce9180edf076114b0a4177a6780acb95c3ff8e8078918d14b9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/JPPO02203394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc137b9a89572f07b7eb48deb754f79aef5bb46cc15fbd6e3aed44c4639c5df7e. 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/JPPO02203395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ad392089f34e1e66c8909c690e2e94d10f674d66b7a4ad70bff63b5b34f25f. 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/JPPO02203396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573a8fb2dda49b38af791d26dc6ad48227c18c35dc8768de71133a4b870899f0. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/JPPO02301457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28c32bc16e81018dada986b321bf3ea00c7c9d77f9d5e45df79a4aa90f175d7. Chain 2 (Bitcoin): anchored in block 958602 (2026-07-18T19:28:16Z), 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/JPPO02301456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28c32bc16e81018dada986b321bf3ea00c7c9d77f9d5e45df79a4aa90f175d7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/JPPO02301456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa5f8cb638471994335caef28aa50eb10abaf38fc55f52fe6c13476b969fac52. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/JPPO02301459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa240bca2c4c02008b581880e35abbb4576d37e8c55776fb4be7d36c22d43f8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:21:16Z), 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/JPPO02202367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bbfe7db0f5d3205bb416a3b654800523226c5c8f412cddcb3cf731c9465201. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/JPPO02301461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26ab9f691fdf0ce9180edf076114b0a4177a6780acb95c3ff8e8078918d14b9. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/JPPO02203394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f656ec6e7a3ed844cb2fa04641c056878f2bdfe46e48982878084a99b2617e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/JPPO02301462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af0f4d336590183db6a734b3ab1b6a8642c8eefee17e86db495505b45a90f6b. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/JPPO02304145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782408b6d3d8e82be1808d74df5b8c01f106c7551846b9e13d7920a85cf4da46. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPPO02304146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d72224f7998c3f3b5bc0eaf1c6742934cc20de6639188e2a0ad11f3fa6d6fae. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/JPPO02401778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31a5bd147815ca0267293cc66fdcc7d1bcb5a9834afcaac60cf535fb8c3aea7. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/JPPO02401779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a0f4c18e09ceb502beceb61cbf3ed94f704b8654e5b297fe8bdb9735e5dcc3. 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/JPPO02404175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7ada98f03453e0df218e08b3df918d69b25f7750611bf1085bd0bfe2bb4e28. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:27:35Z), 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/JPPO02502931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7ada98f03453e0df218e08b3df918d69b25f7750611bf1085bd0bfe2bb4e28. 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/JPPO02502931.