How Image Provenance & C2PA Metadata Works
The Coalition for Content Provenance and Authenticity (C2PA) is the open technical standard adopted by Adobe, Microsoft, Google, Leica, and Nikon. It embeds cryptographically signed metadata into images to prove whether a photo was captured on a physical camera sensor or generated by an artificial intelligence model.
PNG Text Chunks (tEXt / iTXt): Popular generative tools like Stable Diffusion, Automatic1111, and ComfyUI embed the exact positive prompt, negative prompt, seed number, and model checkpoint directly into the image header.
Social Media Metadata Stripping: Platforms like Twitter/X, Instagram, and WhatsApp automatically strip all EXIF and C2PA metadata during image compression. Our tool flags when metadata has been wiped.