Prove it existed.
Without showing it.
Drop a file or paste text. Your browser fingerprints it with SHA-256 — the file itself never leaves your device. Only the fingerprint is sealed, into a receipt that proves this existed at this moment, and that anyone can check without ever seeing your data.
Fingerprint it here
Drop a file or paste text below. SHA-256 runs on your machine; nothing is uploaded.
Settle the fingerprint
The console seals the 64-character fingerprint into the chain. Costs 1 tick (€0.01).
Keep the receipt
Verifiable by anyone, offline, forever. The file stays private.
The console opens with this fingerprint prefilled. Settling spends one tick from your Proof Account. Machines do this too: AI agents seal and verify fingerprints through the Recognitium MCP server and the same public API — one receipt format, human or machine.
A settlement receipt, sealed in the chain
Identical data can share a hash. It cannot share the same moment.
SHA-256 proves the data. Recognitium proves the event.
Recognitium is not an AI provider. Intelligence becomes a utility; Recognitium becomes the trust utility: receipts anyone can verify, for any application that needs to prove what existed, when, without seeing the data.
The universal proof button.
For humans, it is evidence. For machines, it is memory. For institutions, it is trust.
Recognitium is not storage, not AI, and not a blockchain. It is a trust utility: hash locally, settle the moment, keep the receipt.
Hash locally
Text, files, images, contracts, screenshots, logs, or any bytes become SHA-256 inside the browser.
Settle the moment
Only the hash is sent after approval. Recognitium binds it to sequence, time, and settlement evidence.
Keep the receipt
The file stays private. The receipt travels anywhere and proves the event without revealing the data.
A one-way hash and a chain that only moves forward make any piece of digital data irreversible the moment it settles.
Not by seeing the data. Not by storing the data. By settling the hash as an event.
Drag Save as Proof to your bookmarks bar.
Select text on any HTTPS page, click the bookmark, and your browser creates the hash before the console opens with it prefilled. The selected text is never sent to us.
The only thing Recognitium can receive is the hash you choose to settle.
Every digital event deserves a final receipt.
This is the live chain. Every seal advances the sequence by one, and the order can never be rewritten afterwards.
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Every receipt is unique · final by design