was a Japanese girl group formed by Up-Front Create in 2016. The group consisted of three members: Miyabi Natsuyaki, Hikaru Kobayashi, and Yūka Nihei. Pink Cres. debuted in 2017 with the album Cresc
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 0x9c3f3e64ee45b5f2f18cb4b90713ff09cd9f81a7bff4191ac86233421c546be1. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f63a37bc-4cd9-47c1-8336-f2d4e691b246.json and https://artists.proofprofile.net/proofs/artist/f63a37bc-4cd9-47c1-8336-f2d4e691b246.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
トウキョウ・コンフュージョン/宇宙の女は甘くない