Guides

Short articles on which traces AI-generated content carries, how these traces are checked and what cannot be checked.

• How can you tell if a photo was made with AI?

  Is this photo AI? A step-by-step check with Content Credentials (C2PA), invisible watermarks and file metadata, and what each result means.

• What are C2PA Content Credentials and how do you read them?

  What are Content Credentials (C2PA)? What AI tools and cameras write into a file, how the signature is verified and why it can be removed.

• What is SynthID and how do you check for it?

  Which content carries Google's invisible SynthID watermark, who uses it, and how can you check whether an image or video has it?

• Do ChatGPT, Gemini and Claude texts carry hidden watermarks?

  How do watermarks in AI-generated text work, and who can check them? Are invisible characters watermarks? The situation as of October 2026.