You shouldn't exclude what your bank may know. And even if your bank is in Vegas, they'll sell your data faster than you can sneeze.
I believe there are countless ways to determine if your CRK is 'real'. For example, if a magnet sticks to a scale, it's not Titanium. If the lanyards are not the right fabric. If it's not the correct weight.
Bigger clues:
Did you buy it from a dude named Ali Baba?
Did you buy it from a warehouse named after the largest river in South America?
Did you fail to buy it from an authorized and reputable dealer?