Built on C2PA Content Credentials
Nothing on your image you didn't put there.
Sign your own photographs, carry a mark you control, and read what any file says about itself.
You sign it once.
How signing worksSigning adds two things: a credential that says who made the file, and an invisible mark that points back to it. The picture is untouched.
- 03Your credentialwho, when, with what · signed
- 02Your markin the pixels · invisible · points to 03
- 01The photographuntouched
Free to inspect. Pay when you sign for a living.
All plansInspecting any file is free on every plan.
You hold the keys
Signing happens on your device or in your camera.
Invisible by default
The mark can't be seen. A proof overlay is your call.
Survives the upload
Stripped metadata is found again through your mark.
Reads any file
Yours, someone else's, a generator's, or nothing at all.
An open standard
C2PA Content Credentials. Anyone can verify without us.
Never removes
A mark that isn't yours is reported and left alone.
What survives being passed around?
Full breakdownFigures from the research, each cited on its own page.
A platform strips it. Your mark finds it again.
Durable credentialsMost platforms throw metadata away on upload. The mark survives, and leads back to the credential you published.
01At capture
02After upload
03On inspection
Drop in any file and see what it says.
Your uploadsFour things a file can turn out to say. Only one of them is yours.
Signed by you.
Nothing attached.
Reported, not removed.
Changed after signing.
Every reading is a record you can keep.
Where it livesReadings come back as plain data: what was found, who signed it, how sure the detector is.
{
"file": {
"name": "harbour-dusk.jpg",
"sha256": "ce9b8905ff5d21f4…e88e76a88",
"width": 6240,
"height": 4160
},
"state": "verified",
"credential": {
"standard": "C2PA 2.2",
"signer": "Example Studio",
"signed": "2026-10-07T09:12:44Z",
"key": "hardware"
},
"mark": {
"bits": 96,
"present": true,
"confidence": 0.9961
},
"other_marks": []
}Here's what we'll never do.
Our rulesFour lines we don't cross, on any plan.
Remove a mark you didn't put there.
Call a credential a lock.
Hold your keys.
Add anything visible unless you ask.
Curious how it works? We wrote it down.
All researchField notes on credentials and watermarks, cited and dated.
Questions people ask first.
Does deprint remove watermarks?
No. It never removes a mark you didn't put there. A generator's disclosure watermark or another studio's credential is reported in plain words and left in place.
Is a credential copy protection?
No. A credential is a signed statement about a file: who made it, when, and with what. It lets anyone check that statement. It does not stop a copy being made.
What happens to my signed files if I leave?
They stay signed. The credential is inside the file and the signature keeps verifying. You can export the manifests you published, so recovery lookups keep working if you host them yourself.
Do you hold my signing keys?
No. Keys live in your camera or on your device. We never receive them and cannot recover them.
Can I inspect a file without signing anything?
Yes. Inspecting is free on every plan and has no monthly limit.