is a Japanese hurdler. He competed in the 400 metres hurdles event at the 2015 World Championships in Beijing without qualifying for the semifinals. Earlier that year he won the gold medal at the 201
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 0x3c76a09b1c8e343150862eefe4d70197dab263c82b46afa887ad3eb61ccbd701. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f03a4a1-384c-4c30-b5cc-148274f9350a.json and https://artists.proofprofile.net/proofs/artist/9f03a4a1-384c-4c30-b5cc-148274f9350a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).