would i be allowed to link a artists twitter or FA in the description of a post or is that not allowed helping a freind upload some art but cant find the OG source for them on their sites

kora_viridian said:
I know some existing posts on e621 have incomplete sources listed, like just https://furaffinity.net/user/Example , or https://twitter.com/Example . If you have a source like that, I think it's OK to list it in the sources for a post.

You might also try running the images through a furry-specific reverse image search like SauceNAO , Kheina , or Fluffle to see if you can find the originals. Fluffle, in particular, was able to index some of Twitter, at least until the recent difficulties at Twitter (spring 2023). If none of those find a source, then try "generic" reverse image searches like Google, but those sometimes don't work as well as the furry-specific ones.

If it's the only mirror available, some people even use Paheal. I've seen Mega.nz and Google Drive and so on, as well.