Real Satoshi won't reveal his/her/their identity, especially knowing how identity-based hate could be used to harm Bitcoin reputation and possibility harmed by authoritarian government.
But that's not the point if this discussion, you didn't thought that this is all just hypothetical? Yes, you're right and you've got a point as to why Satoshi won't go public but it's not the point.
To me, I think that the only proof that Satoshi could identify himself is probably doing a signed message on his address, or logging in his forum account or logging in the Bitcointalk forum prototype (forgot the name of predecessor).