CX Ground Staff will actually check your baggage against your name in the flight manifest to see not only if you're on the flight but also if you're an elite member or travelling in J/F class.

Many times connecting from an AA flight where no Priority tags were put when I started with AA, and upon arrival at my final destination, my bag came off first... and I see that the appropriate tag has been placed on the lugguage handle... the original destination tag put on by AA is still in place, so CX did the former when the bag came over from AA.

CX ground staff do this at all of their destinations.