Tojo may refer to: Places Tōjō, Hiroshima, Japan, a town Tōjō, Hyōgo, Japan, a town merged with others to form the city of Katō Tōjō Station (Aichi), a railway station in Toyokawa, Aichi Prefecture,
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 0x5f744f1ff9ddce77c3e6f2808a45d961378b514e5aeaf96e972cc35132aeba79. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5ec079c-d8b8-4544-aaeb-1d8cd8c2ea56.json and https://artists.proofprofile.net/proofs/artist/e5ec079c-d8b8-4544-aaeb-1d8cd8c2ea56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).