Me and my guys in my kids rec league were debating this just this past Saturday...
One guy was on his high horse about any part of the body other than a hand or foot hitting the floor was a travel. I advised him that if the dribble was maintained during the "hitting of the floor with other body parts" it was legal....He tried to tell me it was travel...I told him to look it up in the rule AND case book....we agreed that holding the ball and going to the floor was a travel but not while maintaining the dribble. He later came over to my court between games and said I was correct.
Sounds as if your play is legal as well (of course somebody posted case play)...