Fuji may refer to: Places China Fuji, Xiangcheng City (付集镇), town in Xiangcheng City, Henan Japan Mount Fuji, the tallest mountain in Japan Fuji River, river in Yamanashi and Shizuoka Prefectures
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 0xb8c318c5bf9c5bba59287fa5daee86bffa9f30fdffd355314299d6dd98930604. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e221791-f190-4200-9e4e-50e8ea9cca00.json and https://artists.proofprofile.net/proofs/artist/2e221791-f190-4200-9e4e-50e8ea9cca00.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).