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Check if a file was made with Claude

claude.com

41–50 of 144 posts

Re: Check if a file was made with Claude

#41
post #24

Under what circumstances does the metadata get added? When Claude Code CLI needs a media file usually I just see it run an imagemagick or ffmpeg command to create one, which isn't going to have C2PA metadata. Edit: I asked Opus 5 for "a jpg of a cat" via the web chat. It did it by writing an svg and then rendering that to a jpeg. Clicking the "download" button saved a jpg which did have C2PA metadata, seemingly injec…

Well, guess they are just trying to conform all the weird EU checkmarks

Re: Check if a file was made with Claude

#42

This is really fascinating. Even the AI companies have incentives to reject AI generated content. It's like they want you to use AI for everything, but they don't want AI output fed back to them. At work, right after an AI training, we were asked to use our "authentic" voice when writing mid year reviews.

Just like the tech company owners not allowing their kids access to social media…

Not really. This is more like not pumping the exhaust back into the intake.

Re: Check if a file was made with Claude

#43
> Knowing where content came from, and whether AI was involved, makes it easier to trust what you see online.

That’s a cute way to imply their service is used to generate misinformation. They are basically saying to not trust the AI content made from their own product :)

Re: Check if a file was made with Claude

#44
post #34
post #32

>Supported formats: JPG, PNG, GIF, WEBP, TIFF, HEIC, AVIF, SVG, DNG, JXL, MP4, MOV, AVI, WAV, MP3, M4A, FLAC · up to 100 MB I'm wondering why they have restricted file types. You can't check a PDF for example... surely the main use case for people will be to check if a document was produced or edited by an LLM? That could be an attractive (if not misunderstood) proposition for academics

Luckily all pdfs I made in academia have been generated from source (tex or derivatives, asciidoc) and llm are better in generating source than pdf. Even people that didn’t use tex used Word to generate the pdf. So I’m unsure what your aiming at.

Source can have markers inserted in it as weighted word choice or phrase choices, how commas are inserted, etc., so that the output can still can be identified. In other words just because it's source doesn't mean it can be watermarked.

Re: Check if a file was made with Claude

#45
post #6

Earlier quoted context omitted.

You misunderstand how Claude watermarks things.

Most critics of watermarking have no idea how it works. Yet there are valid arguments against (and for) it, but they prefer to be misleading

What are the valid arguments against? Is it about the fact that the output isn’t “optimal”?

Re: Check if a file was made with Claude

#46
What is interesting to me is that stripping the C2PA data is easy, but faking it is hard.

You can resave the file and the "made with Claude" signal disappears, but you cannot make a random file pass as Claude-made without Anthropic's signing key. So the useful guarantee is one-way. No signature means almost nothing.

Re: Check if a file was made with Claude

#47

How 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?

I'm so curious if you're actually able to keep a straight face while typing that.

Re: Check if a file was made with Claude

#48
post #33
post #5

This is just C2PA for Claude-processed files, apparently. It's not related to their text watermarking. C2PA is file metadata and can be trivially stripped away, unlike hidden watermarks, e.g. SynthID.

That is where their responsibility ends in terms of the EU AI Act. And that is fine and how it should be, no secret watermarks.

Watermarks should even be removable "if substantially proofread or altered" in the EU for the text from an LLM, that you verify to be as true as if you wrote it yourself. Not clear is this is a may, shall, or should. It certainly is not a must.

Re: Check if a file was made with Claude

#49
post #33
post #5

This is just C2PA for Claude-processed files, apparently. It's not related to their text watermarking. C2PA is file metadata and can be trivially stripped away, unlike hidden watermarks, e.g. SynthID.

That is where their responsibility ends in terms of the EU AI Act. And that is fine and how it should be, no secret watermarks.

Watermarks cane even be removed, "if substantially proofread" in the EU, law says. For the text from an LLM, that you verify to be as true as if you wrote it yourself. Not clear is this is a may, shall, or should. It certainly is not a must.
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