is a Japanese girl group consisting of Kano Fujihira, Soyoka Yoshida, Tsugumi Aritomo, and Momoe Mori. It was formed in 2019, when all the members were 15 years old. In addition to music, they have b
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 0x550677ce436c53c23fd40c4c9f3af1635368a1f019e8ba5b32a6891e00097d9f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/079953dd-28e5-4eee-9cbc-b1ec658c20f7.json and https://artists.proofprofile.net/proofs/artist/079953dd-28e5-4eee-9cbc-b1ec658c20f7.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 0xc34bb45a90d276791ec15c109f294ce8387d7c1aa399c4e9c9919b7f301136a6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPC102100225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31da6a1e9c1d5bea30dabf1015579072c742f98d303525c986947a694082cab. 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/JPC101900153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x656da48f7188c73370cfe32a819395519c610cf1116477a30246f3e773c21579. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPC102100244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ef0c5283b9f553b17fc5a06194ee395c8717682587b5497c12a04833f36311. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:29Z), 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/JPC102100245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6aad49b37af39eef61c9bfd8754169acd34aebdf72983f1c49d9e39f3a6f7eb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/JPC102000172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d9f09c7e4133141ed29f4793f82700e88f968b69c5cccc92872ec0830a0c73. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/JPC102000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae7aa1653d323ca02a7a85d8d5497fa8f0b49724041b9a50114186c4052b812. 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/JPB602400038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995d5ee121c41545781c973f92d7adca5137a72a9340519b96ee0a17fe672bf8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:33Z), 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/JPB602303105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb85edc054b94e174cea9b726529b87c62d977e8a0b38e4f84316d9c27669144. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/JPB602400893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595614b443dc9aa9a494d85598a0becf2769828499647572f73556a50b0f4eb8. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/JPB602304866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42344f54d4efeca5f524562c9e82d1cb1c557748465d2b9c7fdccade590e48de. 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/JPB602400898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe472da5b7b3d79e93b4b20eb3bb4becff23fc04482e0186715403ba7663ea0d5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/JPB602204200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9af8e98b33a45fae3d47247face0a63ea0bbb46454c4281417f440efdab872. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/JPB602301375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008f1dd51c3688411ee584565ed5a41e48626a2503417078427feb68ef5fe49f. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/JPB602303107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ef4ac47080390c8a661f82d9702e048ba621240810810203274a43e23819c53. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/JPB602303109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb6bb0976a5686602caa513a216bcd68308037a64885709d67a09c33de9cee3. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/JPB602500466.