Brevis Vera: Proving What’s Real in the Age of AI

2026-03-09

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TL;DR

Brevis Vera is an end-to-end media authenticity attestation system that lets anyone verify a published image or video originated from a real device and was only edited in provable, legitimate ways. By combining hardware-backed capture signatures (C2PA) with zero-knowledge proofs of the editing process powered by Brevis Pico zkVM, Vera preserves authenticity from capture through every edit to final publication. Now live.

The Trust Problem

Every day, millions of images and videos are shared online with no way to verify whether they’re real. Deepfakes have gotten good enough that even trained eyes can’t reliably tell the difference, and the tools to create them are becoming more accessible by the month. The default reaction to any striking image online has shifted from curiosity to suspicion.

The obvious response has been to build better detectors. Train AI models to spot AI-generated content. But this approach has a fundamental flaw: it’s a moving target. Every improvement in detection is matched by an improvement in generation. The two sides are locked in a cycle that never resolves, and the detectors are consistently a step behind.

If you can’t reliably detect fakes after the fact, the only solution is to prove authenticity from the source.

Introducing Brevis Vera

Brevis Vera takes a very different approach. Rather than analyzing whether media looks real, it lets media prove where it came from and what happened to it.

Vera is an end-to-end attestation system that verifies a published image or video originated from a real-world capture event on a real device, and that every edit applied to it along the way was legitimate and provable.

How It Works

Starting at the Source

Brevis Vera builds on the C2PA (Coalition for Content Provenance and Authenticity) standard, which a growing number of device manufacturers now support. C2PA allows a device to cryptographically sign media at the moment of capture, binding the content to the hardware and producing tamper-evident provenance metadata.

This answers the first question: was this captured by a real camera on a real device?

But this is only the starting point, because raw media is rarely what is ultimately published in the real world.

The Editing Gap

Journalists crop images, creators blur faces, editors redact private information and adjust exposure and color. Subtitles and annotations are added, and eventually everything is compressed for faster mobile loading.

These edits are legitimate and necessary. But the moment you modify a signed image, the original hardware signature no longer applies. Even a simple crop breaks the cryptographic binding between the signed file and the published version. Authenticity and editing are in direct tension, and until now there hasn’t been a way to reconcile them.

ZK Proofs of the Edit Path

This is the core innovation behind Brevis Vera.

Vera integrates with open-source editing libraries and uses Brevis Pico zkVM to generate a zero-knowledge proof of the entire editing process. When an editor modifies media with supported software, Vera takes the original C2PA-signed metadata and raw media as input, executes the transformations, and generates a proof that mathematically attests to three things:

the output derives from the signed original,
only permitted transformations were applied,
and no hidden or malicious edits were introduced

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

What This Enables

Brevis Vera preserves cryptographic proof of real-world origin through the entire editing process. It maintains the privacy of both the original raw content and the editorial workflow. Verification happens without centralized intermediaries, and the entire system is open-source.

For the first time, published media can carry verifiable proof that it came from reality and was transformed only in legitimate, provable ways.

Live Now

Brevis Vera is live today. The first release integrates with an open-sourced image editing library and supports a wide range of common transformations. We are currently in discussions with popular consumer-facing image and video editing applications to bring Vera directly into widely used creative tools. We are also open-sourcing the Vera reference implementation on GitHub.

Want to see it in action? Try our interactive conceptual demo to experience how Vera works firsthand.

If you’re interested in trying the full version or collaborating on Brevis Vera, reach out through partner form.

About Brevis

Brevis is a verifiable computing platform powered by zero-knowledge proofs, serving as the infinite compute layer for Web3. Applications can offload expensive computations off-chain while proving every result on-chain. The Brevis stack includes Pico zkVM for general-purpose computation, the ZK Data Coprocessor for trustless access to historical blockchain data, Pico Prism for real-time Ethereum block proving (99.6% coverage, 6.9s average), and ProverNet, a decentralized marketplace for ZK proof generation. To date, Brevis has generated hundreds of millions of proofs across 40+ protocols on 6 blockchains.