Yeah but using a file as a source is pointless and you’re better off just not putting a source.
I disagree. With a file as source, you usually are able to see whether the image was posted on Tumblr, dA, etc. and sometimes can reconstruct the actual post url or at least know where to start looking.
On Tumblr specifically, if it’s a low res picture (1280p or less) and there exists a higher res raw version, you can easily find it by changing parts of the url, even if the original post is unknown/has been deleted.
With no source, you can’t do anything.
@TexasUberAlles
That’s a good idea. Seconded.