Is this sarcasm? Or are you saying that the onus of providing proof is not on the those making the claim, but instead that the onus of proof is on those who did not make the claim?
Are there any copies of what he supposedly posted? I have a hard time believing someone posted groundbreaking exploits to two separate Git websites and not a single person cloned them.
I also think it’s funny that people are alleging .gov conspiracies that end in a publicly hosted “blocked user” page instead of just 404-ing or something.
Forks are still alive on github, so it seems unlikely microsoft did this to suppress the code. Unless they are wildly incompetent, which I don't want to outright reject as a possibility.
Unfortunately I don't think there is any way to see a list of all the forks now that the main repo is dead, but you can search the phrase "A huge thanks to MORSE, MSTIC and Microsoft GHOST for making this public disclosure possible" to find more copies.