Same here; multiple blackberry varieties have simultaneous ripe berries and lingering bloom. Triple Crown often develops late spurs that bloom well after the main crop is done.
Saying that your berries are starting to ripen is premature; they are developing (sizing) and going from green phase to red phase. Save the ripening term for nearly black berries. If Triple Crown, the ripe berries are near-spherical and slightly irregular in shape. On the other hand, 3crown is a late-season crop.