is a Japanese male curler. At the national level, he is a 2018 Japan men's champion curler. He is also a 2025 Asian Winter Games gold medalist, where he represented Japan with curling teammate Tori
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 0x3947d4ee6b15a262ea607949e391e4255509b630bf486fd95e268cb7b6288320. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4ebc222-8ab5-4165-9854-3facb521757a.json and https://artists.proofprofile.net/proofs/artist/e4ebc222-8ab5-4165-9854-3facb521757a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Comparison Syndrome (feat. Una Otomachi)
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 0x3db9839a8a98eebabee70bdce08ca70582e195d6efe550c9d4dcd2f3ab8f7154. 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/TCJPM2059010.
Shichigatsu no yukeiwa kimi wo kou (feat. Una Otomachi)
The sky is blue today (feat. Una Otomachi)
Let the tears see the light of day (feat. Una Otomachi)
Still, we never stop singing (feat. HATSUNE MIKU)