USE THIS, OBVIOUSLY "YOUR CHANNEL NAME" IS WHERE YOU PUT YOUR CHANNEL'S NAME
/channel/YOUR CHANNEL NAME?sub_confirmation=1
TAKE THAT LINK AND USE A LINK SHORTENER SO IT'S NOT SO BIG.
ONCE YOU HAVE THAT SHORTENED LINK PUT IT EVERYWHERE
I.E. FACE BOOK, TWITTER, SIGNATURE, BUSINESS CARDS.
NOW YOU CAN ALWAYS GO TO THE DETAILS OF THAT LINK SHORTENER AND SEE WHO CLICKED IT AND FROM WHAT COUNTRY