---
title: C2PA for live video: Signing and Authentication in Real Time
description: As a leader in digital rights management,EZDRM worked with Qualabs to develop an implementation framework that showcases live video signing using C2PA.
---

[EZ Does It - EZDRM News & Events ](https://www.ezdrm.com/blog)

# [C2PA for live video: Signing and Authentication in Real Time](https://www.ezdrm.com/blog/c2pa-for-live-video-signing-and-authentication-in-real-time)

 Written by [Micaela Hornblas](https://www.ezdrm.com/blog/author/micaela-hornblas) | Jun 12, 2025 2:50:43 PM

As a leader in digital rights management, EZDRM worked with [Qualabs](https://www.qualabs.com/our-work/c2pa-for-live-video-how-to-sign-and-authenticate-content-in-real-time) to develop a C2PA [mailto:C@PA](mailto:C@PA)implementation framework that showcases live video signing and authentication. The solution was developed on an agressive timeline to support a demonstration of how real-time content authentication could work in practice.As AI-generated media, deepfakes, and content manipulation become more sophisticated, the need for authentic, verifiable digital content has never been greater. C2PA (Coalition for Content Provenance and Authenticity) offers a solution by allowing cryptographic signatures and metadata to be embedded in media files, proving their origin and integrity.

The team delivered a production-ready signing proxy capable of performing all critical steps in the live signing workflow, including fragment ingestion, processing each live fMP4 segment, hashing and chaining with anchor-point resets, signing using the C2PA toolchain, and embedding both the signature and hash into the segment’s uuid box.

On the client side, the validator library integrates directly into existing video players. It reads the embedded metadata, replays the CBC chain, and verifies signatures in real time, triggering tamper alerts without interrupting playback.

To read the full case study of this work, please [visit the Qualabs web site](https://www.qualabs.com/our-work/c2pa-for-live-video-how-to-sign-and-authenticate-content-in-real-time).

[View full post](https://www.ezdrm.com/blog/c2pa-for-live-video-signing-and-authentication-in-real-time)

```json
{
  "@context" : "http://schema.org",
  "@type" : "BlogPosting",
  "author" : {
    "@type" : "Person",
    "name" : "Micaela Hornblas"
  },
  "dateModified" : "2025-06-12T14:50:57.215Z",
  "datePublished" : "2025-06-12T14:50:43Z",
  "headline" : "C2PA for live video: Signing and Authentication in Real Time",
  "image" : {
    "@type" : "ImageObject",
    "height" : 628,
    "url" : "https://4669133.fs1.hubspotusercontent-na1.net/hubfs/4669133/Images/EZDRM_Qualabs_C2PA_image2.png",
    "width" : 1200
  },
  "mainEntityOfPage" : "https://www.ezdrm.com/blog/c2pa-for-live-video-signing-and-authentication-in-real-time",
  "publisher" : {
    "@type" : "Organization",
    "logo" : {
      "@type" : "ImageObject",
      "height" : 60.0,
      "url" : "https://hs.ezdrm.com/hubfs/Logos/EZDRM/EZDRM%20full%20color%20trademark%20RGB%20.png",
      "width" : 126.2203
    },
    "name" : "EZ Does It - EZDRM News"
  }
}
```