I thought they were recognized as major leagues since around 1970, when they starting naming a number of their players to the Hall of Fame. As for records, I do remember reading many times that most of them are not official, and indeed many that exist included barnstorming games, which were exhibitions. There would probably be too much conflict about computerizing it into how, for instance, if Satchel Page had pitched to Joe DiMaggio 200 times how that would have affected DiMaggio's batting average and Page's ERA; or in general how both the white and black league records would be lessened if the sport had been integrated all along and the best played against the best.