Toko may refer to: Locations Toko, Cameroon, a commune in Cameroon Toko, New Zealand, a small rural settlement near Stratford, New Zealand Toko, Queensland, a locality in the Shires of Boulia and
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 0x6343a4f5baeb0640d862e186a8f7bc22e7e8cbd4916a1a7f6558b0110f79d70d. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e73e728-2671-49ba-a75e-afa6b13e7c47.json and https://artists.proofprofile.net/proofs/artist/2e73e728-2671-49ba-a75e-afa6b13e7c47.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).