Track: Renewable Energy & Energy Trading (renewable certificate tracking). Small rooftop solar owners make clean energy but cannot prove it cheaply, and buyers cannot see the data behind a green certificate. SunProof audits hourly meter data, hashes every reading into one Merkle root, anchors that root on Solana (devnet), issues 1-MWh Renewable Energy Certificates (RECs) only for energy that passes the audit, blocks double counting, and lets anyone verify.
Open Power System Data, household PV meter residential3 (Konstanz, Germany), April 2017: the raw series reports 885.2 kWh, but 631.1 kWh (71%) of it was gap-filled by the data publisher, not measured. Without using the publisher's flags, SunProof's audit held back 603.1 kWh — 96% of the unmeasured energy — and flagged 0 measured hours. On a clean control month (residential4, June 2017, 1,570.9 kWh) it flagged nothing. Pick "Real data" below to reproduce it.
A buyer or auditor checks a single reading with a short Merkle proof, without downloading the whole dataset.
Every certificate is a Memo-program transaction signed by the SunProof issuer key. A second certificate for an overlapping meter + period is refused, so the same energy cannot be sold twice.
Data: Open Power System Data — Household Data (v2020-04-15, CoSSMic project), CC BY 4.0 · Satellite: PVGIS 5.2 © European Union, JRC (PVGIS-SARAH2). Devnet only: no real money. Open source (MIT): github.com/Solar-DePIN-Hub/sunproof-climatechain · Built by Solar DePIN Hub (Ukraine) for the IEEE ClimateChain Global Hackathon 2026.