Original image
The fingerprint matches and the signature verifies. The image still belongs to the signed ZK-SNAP receipt. ZKAI™·S4 Proven.
Proof Lab
Run the Pixel Test.
Upload an image and mint a real ZK-SNAP receipt for it. Then make the smallest local edit you can: one pixel, one dot, one mark.
Bring the edited image back to Proof Lab and verify it against the original receipt. The signature still proves the receipt is real. The fingerprint proves the file is no longer the same.
Mint a real ZK-SNAP receipt Edit one pixel locally Verify. See it work.
Create
Create receipt
Upload an image to create a real ZK-SNAP receipt. The receipt binds to the image fingerprint, so even a one-pixel edit can be detected later.
Image preview No image selected.
No receipt yet. Select an image, then create a receipt.
Receipt created
Status—
Artifact—
Mode—
Issuer key—
Receipt ID—
Verify
Verify receipt
Select the original image to see it pass, or select your one-pixel edit to see the receipt signature stay valid while the file fingerprint no longer matches.
- Original fingerprint
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- Verify fingerprint
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What the pixel test proves
One-pixel edit
The receipt is still real, but the edited file has a different fingerprint. The original receipt no longer belongs to that file.
Edited receipt
The signature check fails. The signed receipt was changed after minting.
What Proof Lab is
Proof Lab is a real public implementation of the ZK-SNAP receipt path, narrowed to images so anyone can test it safely. It mints a signed ZK-SNAP receipt from an image fingerprint and runs verification against the receipt and file binding. The result is real: a valid signature proves the receipt was properly formed, and the fingerprint check proves whether the selected file is the same artifact.