ETN DataProof records any file or data on the blockchain — without uploading your file anywhere. Only the SHA-256 fingerprint is stored on-chain. Immutable. Verifiable. Forever. 🔐 Single file or text certification 📦 Batch certification via Merkle Tree 🦊 MetaMask users: open inside MetaMask browser → wallet connects automatically ⚡ No crypto? Use Server mode — free Perfect for: → AI data provenance → EU AI Act compliance → Copyright protection Fee: less than $0.0001