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ProofStamp Photo
Take a photo you can check later.
Keep the original photo and its ProofStamp.
Before you take the photo
Location and note are optional. Nothing is uploaded.
Camera ready
Waiting for device location.
Creating your ProofStamp…
Keep this page open. Your photo is staying on this device.
Unable to finish the ProofStamp
Your captured photo is still available on this page.
Photo ready
Captured photo
Location not included
You can still use this ProofStamp without location.
Not saved yet
Keep the original photo and its ProofStamp.
Next
Save the photo with its ProofStamp
The ZIP contains your original photo and its ProofStamp files.
After saving, look for in Files or Downloads.
Not saved yet.
Recommended: email it now for stronger timing evidence
Send the ProofStamp as soon as practical. A short gap between the photo and the received email makes later claims of editing less plausible.
00:00 since photo
Best: send now, ideally within 1 minute. This is a target, not a validity cutoff.
Did you send it?
If yes, keep the received email. Its received time is your external time checkpoint. If you attached the ZIP, the photo and ProofStamp package are kept with it. If not, prepare the email again.
Advanced details
Technical values recorded with this photo. Opening this section only changes what is shown on screen.
Record hash
Email note
Preparing an email does not prove it was sent. If the message is actually sent and received, the inbox received time can provide an external time checkpoint for this ProofStamp. It does not prove when the photo was taken.
On this device Recent photos Open
Check a ProofStamp
Does this photo still match?
Choose the Photo + ProofStamp ZIP you saved with the photo.
Choose the saved ZIP
Choose the Photo + ProofStamp .zip file you saved after taking the photo.
Check against an earlier receipt optional
Paste a ProofStamp receipt you saved or emailed earlier to confirm this is the same record.
Advanced details
Technical users can check the photo and capture.json separately.
ProofStamp Photo
How it works
Keep the photo. Keep its ProofStamp. Check the pair later.
- Take the photo.ProofStamp keeps the exact photo file it receives and creates a record for it on your device.
- Save Photo + ProofStamp.The ZIP contains the original photo and the files needed to check its ProofStamp later. Keep the ZIP somewhere you can find it.
- Email it as soon as practical.A received email provides an external time checkpoint showing the ProofStamp existed by then. A short gap after the photo makes later claims of editing less plausible. Attach the saved ZIP if you want the original photo and ProofStamp package kept with the email.
- Check later.Choose the saved ZIP. A match means the photo still matches its accompanying record. An earlier receipt or email link can additionally connect it to that earlier ProofStamp.
What a match does not prove
It does not prove who took the photo, that the scene is true, or that device-reported time or location was accurate. The email received time is separate timing evidence: it shows the ProofStamp existed by then, not exactly when the photo was taken.