Buono! was a subgroup of the Japanese girl groups Berryz Kobo and Cute, formed in 2007 by Up-Front Promotion and associated with Hello! Project. The members consisted of Momoko Tsugunaga and Miyabi Na
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 0x279527c72384f50d5b6b1c257562997ca1d6ecaa5737d037cd3f3739d4106887. 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/0b7e4998-9237-4061-bc84-89be07f8b903.json and https://artists.proofprofile.net/proofs/artist/0b7e4998-9237-4061-bc84-89be07f8b903.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 0xe24908a3fb4fe155dfcbc3b7f4603b4275bbaa0ef265fc04ba6f55d516bfa196. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/JPPC00802454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859aa76e5dd009377fe53b7902057643ea8abb9f13fb50b80bea357d218d72cd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/JPA601100247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f35f1abd4005abf08e89bcaebbb26d1c367833b6c5759784b7140b516c7386. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/JPPC00900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31611f395e9b73b7a8838d531b600f274df9aac49393af96fcf6351b8ee3221. 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/JPA601100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe60387f6ce53349834ea5c55b547007a52508eb06b7a348d15cf7281d37be7d5. 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/JPA601100037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c773a8223ef25263f4b0e928f01447691b8cd4e004a6b67cca6b849abb66946. 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/JPPC00902232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13801c3b145de2275e07e2636732c932b346304e9233183bd79064e133411c3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/JPA601100221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048f13807c6b96c0f1a534955eee8da7d48f9e029888435a6d192c5ed04af732. 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/JPA601100222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b67f7c9895e4e35aec56a8eb38eb0b669f4fd01a6b0e08526315b77a18b4467. 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/JPPC00903689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8704b4b47c0ae6ee525d1b10842977c39237bac6d7935be4b65eedc0ee427c44. 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/JPA601600151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92d0781967c3285f32bc7c7a3f016822406b9c855ef7371954ef1b53123b1298. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPA601700233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38b7bae0df5e51277b1cc16ca4ba2d4ae50b926244639fd7db7208f4608a778f. 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/JPPC00904312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5353081ae6c8af4d23319b3e2829bc605331568a4c522ffd7453d8d95161c4. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/JPA601700234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177fa88e163f056b416fd52922c9e584c7d8c6c2af5539e9bce6d9642f80388e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/JPA601700235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3fa6230f3d00c50c772fa2a0ff2490121ed91a6b88fec9fa346c92de6265653. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/JPPC00800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x584c84ca826d06191e5f978d13df109202be3ef506d9ec4e055de01d01a47526. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/JPPC00904345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc0f964f4d73d1af70fff71cdd3837ea8f685a78cc10d93cd41760e63919345. 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/JPA601200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff151f391887806033e09b3591cafbc702aa0356054600d62d12da796f449b72. 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/JPA601600150.