H. David

About

Building blockchain tools for AI data certification. Creator of ETN DataProof & Prompt Registry. Web3 developer · Data Provenance · EU AI Act

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Tastemaker

Gone streaking

Maker History

ETN DataProof — Web3Certify any data on blockchain for less than $0.0001
May 2026

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Joined Product HuntMay 19th, 2026

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1d ago

ETN DataProof — Web3 - Certify any data on blockchain for less than $0.0001

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