As others have noted, you cannot use Campagnolo compact rings on a record crank because the bolt circle is different (110 vs. 135). But that doesn't stop you from using any 135bcd 50t ring on your Record crankset. There are a few producers of rings to fit the 135 pattern,and there' no reason not to make the change to get gearing more suited to your needs. You are limited to 39t minimum because any smaller would have teeth within the bolt circle, but that's the only restriction.

Long before anyone came up with marketing "compact drive" riders were setting bikes up with the rings of their choice. My wife's bike is set up 39/46 which with a 12/26 cassette gives her gears that she can actually use, vs. what a 53t would yield.