Proof of Human

Give your work a clear record.

Human Sigil creates a private proof record for a submitted image, then gives you a sealed download and public certificate that describes the recorded details.

Create a proof record See how proof records work

Every claim stays tied to inspectable evidence.

Proof record issued

Submitted image details · Public certificate

Our founding promises

Trust should be inspectable.

Evidence, not a vague score

Every certificate shows the recorded file details behind it.

No ownership grab

Creators retain ownership of their work and decide what to publish.

Honest limits

Certificates show what was verified—never more than the evidence supports.

From submission to certificate

A clear record for your audience.

Human Sigil makes the record and its limits clear before you share it.

Step 1

Create a proof record

Create a timestamped record for a submitted image, including its file details and SHA-256 source checksum.

Step 2

Issue the record

Turn that record into a shareable certificate and a downloadable image carrying its Human Sigil reference.

Step 3

Share the certificate

Give audiences, editors, collectors, and clients a public certificate page they can inspect without a Human Sigil account.

Image privacy promise

Your image stays private to your workspace.

Human Sigil uses your uploaded image only to create the requested proof record and sealed download. The source remains private to your workspace, the public certificate contains record details only, and your image is never used to train AI.

Plans built around publishing

Pay for the proof you issue.

Verify one image for $0.99, or choose Studio for 50 image verifications every billing month.

Single verification

For issuing a Proof of Human verification when you need it.

$0.99/image

One image verification
Public verification pages
Downloadable image with Human Sigil seal
Certificate history

Verify one image

Best for working creators

Studio

For working creators and small editorial teams.

$19/month

50 image verifications per billing month
Up to 5 collaborators
One proof record per submitted image
Private workspace record history
Priority support

Start with Studio

Clear answers

What verification means.

Make the record visible

Give your work the context it deserves.

Create your first Human Sigil certificate and publish the recorded details alongside your work.

Create a proof record Read our verification principles