Overview

Brevis Vera is an end-to-end media authenticity certification system that allows anyone to verify whether published images or videos come from a real device and have only undergone provable, compliant, and legitimate edits. Vera combines hardware-backed C2PA certification with zero-knowledge proofs generated by Brevis Pico zkVM for the editing process, ensuring the authenticity of content from capture through each edit to final publication. Brevis Vera has officially launched.

Trust Crisis

Millions of images and videos are shared online every day, but we have almost no way to verify their authenticity.

Deep fakes have become so realistic that even trained eyes can barely discern the truth consistently, and tools for creating such false content are rapidly becoming widespread. Today, the default reaction of people to any eye-catching online image has shifted from curiosity to skepticism.

In the face of this phenomenon, the most straightforward response is to create a better detection system: train AI models to identify AI-generated content. However, this approach has a fundamental flaw: this detection is like a shooting game where the target constantly changes; as detection capabilities improve, generation capabilities will simultaneously advance. Both sides seem trapped in a cycle that can never be broken, with the detection system always lagging behind.

Understanding Brevis Vera

Brevis Vera takes a fundamentally different approach:

It does not analyze whether a piece of media content "looks real," but rather allows the media content itself to prove where it comes from and what it has undergone during dissemination.

Vera is an end-to-end certification system used to verify that published images or videos indeed originate from a real-world capture event on a legitimate device and that every subsequent edit applied is legitimate, verifiable, and provable.

How It Works

Starting from the Source

Brevis Vera is built upon the C2PA (Coalition for Content Provenance and Authenticity) standard. More and more device manufacturers are now supporting C2PA. C2PA allows devices to cryptographically sign media content at the moment of capture, binding the content to the hardware and generating provenance metadata with tamper-evident properties.

This answers the first question: Was it captured by a real camera on a real device?

But this is only the starting point because, in the real world, what is eventually published is often not the unprocessed original material.

The Editing Gap

Reporters might crop images, creators might pixelate faces, editors might obscure private information, and adjust exposure and colors. Subtitles and annotations will be added, and ultimately all content will be compressed for faster loading on mobile devices.

These edits are both legitimate and necessary. But once you modify a signed image, the original hardware signature is no longer applicable. Even a simple crop can break the cryptographic binding between the signed file and the published version. Authenticity and editing are naturally in tension, and until now, there has been no method to unify the two.

ZK Proof of the Editing Path

This is the core innovation of Brevis Vera.

Vera integrates with open-source editing libraries and uses Brevis Pico zkVM to generate zero-knowledge proofs for the entire editing process. When an editor modifies media content using supported software, Vera takes the original, C2PA-signed metadata along with the original media as input, performs the corresponding transformation operations, and generates a mathematical proof that can prove three things:

• The output content was indeed derived from the signed original content;
• Only permitted transformations were applied;
• No hidden or malicious edits were introduced.

The proof is generated locally and can be independently verified by anyone, without exposing the original content or editing workflow.

What Changes Will This Bring?

Brevis Vera retains a cryptographic proof of "originating from the real world" throughout the editing process while maintaining the privacy of the original material and editing workflow. The verification process does not require the participation of any centralized intermediary, and the whole system is fully open source.

This means that media content can now carry verifiable proof at the time of publication: it indeed originates from reality and has only undergone legitimate, provable edits and transformations.

Now Live

Brevis Vera has officially launched today, with the first version integrated into an open-source image editing library, supporting a range of common transformation operations.

Currently, we are in discussions with multiple mainstream consumer image and video editing applications to plan for direct integration of Vera into widely used creative tools. We will also open source the reference implementation of Vera on GitHub.

Want to see how it works? Feel free to try our interactive concept demo to experience how Vera operates.

If you are interested in trying the full version or collaborating with Brevis Vera, please contact us through the partner form.