GreenCheckmark

Is GreenCheckmark free? Will my data be monetized?

GreenCheckmark is a community giveback project. It will be free during its initial stages. A paid version will be created later to recover operational costs. We do not monetize your data and will continue to operate as a not-for-profit organization.

I have just recorded a video using GreenCheckmark. How can I verify it has been properly signed?

You can visit the official validator from C2PA at verify.contentauthenticity.org and select the video or photo you have just saved. Other validators include Adobe's Content Authenticity Inspect and c2paviewer.com.

How does GreenCheckmark establish authenticity?

After the media is recorded, a C2PA manifest is created and signed by a Trusted Certificate Authority. The manifest is stored inside the media file so it travels with the content and is verifiable by anyone.

Does GreenCheckmark protect against screen capturing or photos of screens?

Yes. The app runs an anti-screen capture check before signing. If the check fails, you have the option to save the media without GreenCheckmark signature.

I saw a video on social media with a GreenCheckmark logo. Can I verify its authenticity?

Google, Meta and TikTok are working on enabling their platforms to show C2PA signatures.

Currently, Google Photos has been enabled to show C2PA signatures. And YouTube is adding support too.

You can also use the URL or QR code on GreenCheckmark banner to access the original video as recorded by the author. That is the original footage as captured by the author.

What is C2PA?

C2PA (Coalition for Content Provenance and Authenticity) is an open technical standard that allows creators to embed information about the origin and history of digital content.

Major companies including Adobe, Microsoft, Google, BBC, Sony, and Nikon form its core. They are also working on implementing it in their products. E.g. Google Pixel 10's camera app, Pro cameras such as Leica M11-P, Nikon Z6III, and many more.

C2PA is much more reliable than watermarks, as watermarks can be manipulated by AI software.

Are there more details on how C2PA works on the Pixel camera app?

Yes! Google recently announced Trusted Images for Pixel and Android, which also uses C2PA and hardware security to verify photos. GreenCheckmark follows a similar approach and signs both photos and videos.

How can I verify if a GreenCheckmark photo/video has not been modified?

Viewers have three ways to validate it:

1. Online Inspection: Use verify.contentauthenticity.org or Adobe's Content Authenticity Inspect. They verify that the signature is signed by a trusted certificate authority and matches the content. If there are any discrepancies, they will highlight them for you.
2. Chrome Extension: Install the GreenCheckmark extension to automatically flag images with GreenCheckmark banner but invalid signature.
3. Visual Comparison: Use the original link on the GreenCheckmark banner to compare the media you watched against the original version captured by the author.

Is GreenCheckmark a C2PA conformant product?

Not yet. We are working on it. GreenCheckmark leverages its specification and produces a valid manifest using c2pa-ios and the Android SDK.

But it's not yet conformant, primarily because we are using self-signed certificates during beta testing.

We are a Contributor Member of the C2PA organization.

How can I connect with the GreenCheckmark community?

Join the GreenCheckmark community on Reddit at r/GreenCheckmark to:

• Share your verified photos and videos
• Get help and ask questions
• Provide feedback and suggestions
• Stay updated on new features and developments
• Connect with other users who care about media authenticity

We'd love to have you as part of our growing community!