Is 360 Spin move legal?

[APG]

You still haven't answered what rule set you're looking for an answer for. I think you're looking for FIBA rules, but if you're not, you need to specify

Generally, the dribble ends when the dribbler touches it with both hand simultaneously or allows the ball comes to rest in one or both hands.

At this point you're going to have to determine the pivot foot. If the official determines the dribble ends and the player has one foot is on the floor, that foot becomes the pivot foot once the other touches the floor. If he ends the dribble with both feet in the air, it'll depends. If he lands simultaneously on both feet, then either foot can becomes the pivot foot. If they don't land simultaneously, then the first foot that lands on the ground will be the pivot foot after the other foot touches the floor.

Those are the situation from which you can end the dribble and establish a pivot foot. There are scenarios, that involve the a jump stop (also known as a pro hop for which I think you asked about when you first posted here) where the player would not be able to pivot afterward.

Now I'm pretty sure FIBA rules with establishing the pivot foot are the same as NFHS (high school) and NCAA rules. These situations would play out different under NBA rules, so when you mention an NBA spin move, know that there are moves that are legal under NBA rules that are by rule violations under different rule sets.