is a Japanese singer from Osaka Prefecture and is signed to Lantis. Career ChouCho initially formed the band Lotus Lotus in 2007 when still in high school and performed covers of songs from anime. S
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 0x17eff43b28072396db8c588d962458128a222640f9208afc4405411b5bde5650. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dc2f90a-5150-44d9-b197-4fb85ace4358.json and https://artists.proofprofile.net/proofs/artist/0dc2f90a-5150-44d9-b197-4fb85ace4358.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).