It does kind of say: The GUID is coming from the moderation endpoint, which is hit when you generate a local or cloud AI image based on your prompt. If there is no prompt, there is no endpoint, and likely no GUID.
Obviously Paint could have been watermarking prior to AI though, but this specific AI watermarking appears to be only that.
alt Hacker News
It does kind of say: The GUID is coming from the moderation endpoint, which is hit when you generate a local or cloud AI image based on your prompt. If there is no prompt, there is no endpoint, and likely no GUID.
Obviously Paint could have been watermarking prior to AI though, but this specific AI watermarking appears to be only that.