Did someone just crack my 63s?

[gh9801]

PP 3/6 limit ring. No reads

Folded to Hero in CO, who opens with 6d3d
Button folds, SB calls, BB threebets, Hero calls, SB calls

Flop [ 6c, 3h, Jc ]
SB checks, BB bets, Hero raises, SB calls two cold, BB calls

Turn [ 7h ]
SB checks, BB checks, Hero bets, SB calls, BB checkraises, Hero threebets, SB folds, BB calls

River [ 2c ]
BB bets.
Hero?