The primary functionality is that LLM text is watermarked, but this tool doesn't accept any text formats as input...
Check if a file was made with Claude
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Re: Check if a file was made with Claude
#72To see the signed metadata: go to claude.ai and ask: "generate an image of a cat". When you'll go to download the image, it will offer an SVG and a PNG version that both have the metadata.
In the case of SVG, it's literally `(signature)...` right after the tag. In the case of PNG, it's stuffed as a `caBX` chunk.
To declaw these files, you can ask in your CLAUDE.md to run `exiftool -jumbf:all=` (for jpg & png), and to simply directly remove the tag in SVG files. I haven't looked at video files yet.
Re: Check if a file was made with Claude
#73The primary functionality is that LLM text is watermarked, but this tool doesn't accept any text formats as input...
> How can I tell if Claude created the text?
> To detect watermarks embedded in text we have a Detection API which is currently in private preview to eligible organizations as required under EU law.
Re: Check if a file was made with Claude
#74How long before they change the terms and conditions to subtly claim ownership of your files? When you write code they already insert Co author attribution/ Say I write a text by hand And then I tell it to clean up the grammar and fix some sentences Did it make it? This is also interesting for those companies that siphoned the entire open web
Microsoft Word has not claimed ownership in 40 years. Why would Anthropic do?
Microsoft Word does not write your documents for you.
Re: Check if a file was made with Claude
#75Can't they just store checksums of all their output
Probably violates privacy laws.
Re: Check if a file was made with Claude
#76Up next: 1. Generate a bunch of responses with both Claude and various non-Claude LLMs (ChatGPT, Gemini, Kimi) 2. Train a discriminator model that can differentiate Claude vs. non-Claude 3. Train a de-watermarking model using the discriminator model as loss
Or just write a 6 line program to remove the metainfo from the file?
Your observation is sharp, but it's not just metainfo—it's load-bearing text. To remove it, you need to delve deep and alter the tapestry of carefully selected words.
edit: almost forgot the "—"
Re: Check if a file was made with Claude
#77How long before they change the terms and conditions to subtly claim ownership of your files? When you write code they already insert Co author attribution/ Say I write a text by hand And then I tell it to clean up the grammar and fix some sentences Did it make it? This is also interesting for those companies that siphoned the entire open web
I don't see a legal pathway to do that
The two competing legal arguments regarding copyright of LLM output are "it's like hiring a monkey" (author is the LLM, which is not a person, thus can't hold copyright and can't assign it to you) and "it's like taking a photograph" (the LLM is a machine through which the prompting person expresses their creativity, just like a camera). In no scenario is Anthropic the author of the work.
If we settle on the monkey analogy the Anthropic owns the monkey, but the owner of a monkey doesn't own copyright for the creations of the monkey. If we settle on the camera analogy, anthropic claiming ownership would be like Canon claiming they own pictures you take.
What Anthropic could do is to change the terms to give themselves a non-exclusive global perpetual license to use everything Claude makes
Re: Check if a file was made with Claude
#78Does code also get watermarked? Surely you can't add non printable characters, except perhaps in comments?
Re: Check if a file was made with Claude
#79I just made a figure with Claude and fed it to the tool, which told me there was no evidence it was made with Claude.
So… this utility appears to be pretty worthless.
Re: Check if a file was made with Claude
#80Earlier quoted context omitted.
Or just write a 6 line program to remove the metainfo from the file?
very difficult to remove text watermarking
Outputs can be easily translated from the watermarked language to another, either by just knowing two+ languages, or via non-LLM translation.