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ETcH
€2. Forever.
Blockchain proof of prior authorship — no crypto wallet needed.
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What does ETcH help with?
ETcH anchors the SHA-256 hash of any file on Ethereum mainnet, creating a permanent, tamper-proof proof that your document existed at a specific date.
- No crypto wallet, no signup required
- Pay €2 via Stripe
- Receive a self-contained proof kit ZIP — verifiable by anyone, forever, even if ETcH no longer exists
Admissible as evidence in France (TJ Marseille, March 2025), the EU (eIDAS 2), Italy, Japan, Australia, Canada, and the United States.
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