Dual-CT smart meter readings proven on ICP

EcoPowerHub reads a Tuya dual-CT smart meter every 30 seconds (read-only) and anchors a SHA-256 fingerprint of a reading on the Internet Computer. First meter proof: hash ff5ea62198bdd169e74c4722c2e7e4301c1902b92a0d49c0176c14870d42ce69 on canister ckf7v-xiaaa-aaaal-qxnpq-cai, 18 October 2026. Public certificate: https://ecopowerhub.ai/verify/ff5ea62198bdd169e74c4722. Only the hash and timestamp go on-chain. No command is ever sent to the meter.