Kanji (; , hiragana: かんじ, Katakana: カンジ, , ) are logographic Chinese characters, historically adapted from Chinese writing scripts, used in the writing of Japanese. They comprised a major part of the
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 0xac9ab8704b60411a0db13b8f19c3f54bc24ba7e4aeac028773d0a6f524037d47. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0bdc5cac-999e-434b-8357-3fe80944869f.json and https://artists.proofprofile.net/proofs/artist/0bdc5cac-999e-434b-8357-3fe80944869f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.