just wanted to say..at this point, GPG, PGP, cryptography is not going to prove shit! All you can say is that Yes, this was signed with the proper key! Unless you were watching Dorian at his house and hitting f5 to see a new comment from Satoshi is being posted or not you wouldn't know! That is of course minus the possibility of him scripting it or just giving his key to someone else..... stop saying "sign it brahhh". That's not how it works!
That's a good idea....does anyone have thermal imaging equipment so we can see when Dorian is sitting at his computer?
This, but to prove he didn't setup a delayed message: ask the "real" Satoshi to post a signature that includes a recent block hash which couldn't be known before the live stream commenced?