load 360 flash tool, then click the keys tab and itll pop up. in the cpu key youll need to paste your cpu key and check the box. you will also have to google the 1bl key, if you google 1bl key itll be there. then enter this and check the box then click ok.
then simply load your nand dump and it should give you all your drive info and your dvd key. if it does then your dumps good, if it doesnt then theres something wrong.