I don't think that that may prove that he is a rooster, before he reaches sexual maturity he gender is unknown. Unless you get him sexed somewhere or you vent sex him, vent sexing is dangerous so you must be cautious if you ever do it. The way that he is acting is just showing that he is a quirky little chick that is a oddball. I even had a quirky chick that would hit walls so I named him Danny Bantam, he is a bantam and because he would hit walls, Danny Phantom. Get it? Don't judge. Turns out that he was a she. In fact now, the rooster that I have looked quite feminine when he was a baby, he had the biggest doe eyes markings on his face compared to the others.
Edit: The solitary might work, not %100, if he is not a smart chicken it won't work, some are smart, some aren't. Also, if you train him at a young age to sleep till 7 am to 8 am, it will be ok, but they can also crow at 6 am. Some chickens can even be trained not to crow and I think that it is humane? Don't know much about it, take caution. Good thing that you got a silkie they tend to not to be vocal, I once had three silkie roosters that never crowed.