thumb|100px|Traditional Japanese are a kind of ceremonial origami, folded distinctly from "origami-tsuki". They serve as gifts that express "good wishes". Noshi consists of white paper folded with a
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 0x3959f2672df169876469ae4dff5f73e0aa89195b1894e5cc8bd604d464ce767c. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86711dd7-05e7-4aa7-a161-f49bdb09367b.json and https://artists.proofprofile.net/proofs/artist/86711dd7-05e7-4aa7-a161-f49bdb09367b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).