Anon, you're using hashes and filenames, both which can easily imported from current threads as evidence of anything.
Hashes, as I said don't change willy nilly, so someone posting from a year ago with the same images will have the same hashes today, and everyone else that saved it as well.
Secondly, there's a nifty thing called 4chanX which 70% of the site uses which retains the filename (example: Nino91) instead of the traditional UNIX timestamps for the filename.
Secondly, I can rename my entire folder to Nino* to make it look like the others in 3 seconds with a simply batch script on any OS so this one is nonsense in the first place.
tl;dr your evidence is shaky.