Assuming you used quality shielding tape, the adhesive on the bottom shouldnt interfere with the connection of each piece of copper to each piece of copper, if it DOESNT then you have put a solder joint on each one, bridging each one to the next to connect them.
basically what you gotta do is put a ball of solder on one, put a ground wire from the ball of solder to the top of a pot. then take your multimeter, put the ground on the pot, then touch the hot to each single piece of tape and make sure you get 0.00. this will tell you if each piece of tape is ground or not, if its not ground, then its not benefitting you at all having it in there.