{"slug": "microsoft-paint-and-photos-embed-server-issued-guids-as-invisible-watermarks-in", "title": "Microsoft Paint and Photos Embed Server-Issued GUIDs as Invisible Watermarks in Locally-Generated Images", "summary": "Microsoft's Paint and Photos apps embed server-issued GUIDs as invisible watermarks in locally generated images, with prompt moderation occurring remotely even on Copilot+ PCs where image generation is local. The GUID is added alongside C2PA metadata, and AI-generated images can only be saved in C2PA-preserving formats: PNG, JPEG, GIF, and .paint.", "body_md": "TL;DR\nMicrosoft Paint supports both local and cloud image generation\nPaint and Photos also ship local AI models\nThe two apps send the prompt to a remote server for moderation\nThe server returns a GUID along with the moderated prompt\nThe GUID is embedded into the locally generated image as an invisible watermark\nA separate visible-watermark setting does not control this invisible watermark\nOn Copilot+ PCs, image generation is local but prompt moderation remains remote\nMicrosoft discloses that Paint adds C2PA metadata to AI-generated images\nAI-generated image saves limited to C2PA-preserving formats: PNG, JPEG, GIF, and\n.paint", "url": "https://wpnews.pro/news/microsoft-paint-and-photos-embed-server-issued-guids-as-invisible-watermarks-in", "canonical_source": "https://discuss.privacyguides.net/t/microsoft-paint-and-photos-embed-server-issued-guids-as-invisible-watermarks-in-locally-generated-images/40229#post_1", "published_at": "2026-08-27 06:47:20+00:00", "updated_at": "2026-08-27 07:19:26.837796+00:00", "lang": "en", "topics": ["artificial-intelligence", "ai-policy", "ai-products", "ai-tools"], "entities": ["Microsoft", "Paint", "Photos", "Copilot+", "C2PA"], "alternates": {"html": "https://wpnews.pro/news/microsoft-paint-and-photos-embed-server-issued-guids-as-invisible-watermarks-in", "markdown": "https://wpnews.pro/news/microsoft-paint-and-photos-embed-server-issued-guids-as-invisible-watermarks-in.md", "text": "https://wpnews.pro/news/microsoft-paint-and-photos-embed-server-issued-guids-as-invisible-watermarks-in.txt", "jsonld": "https://wpnews.pro/news/microsoft-paint-and-photos-embed-server-issued-guids-as-invisible-watermarks-in.jsonld"}}