Kotonoha is Japanese for word, language, or waka. It may also refer to: Kotonoha Katsura, a female main character in the fiction School Days (visual novel) Kotonoha, a scanlation group Kotonoha (web
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 0x8f5cf9766be4d7636e27c1a0ca83ac9820caddf154bd50e4ad5b25f4dfec631b. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0c041d4-2b3e-4469-b7fc-b9d16f5ed46a.json and https://artists.proofprofile.net/proofs/artist/a0c041d4-2b3e-4469-b7fc-b9d16f5ed46a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).