There are a variety of other ways to do an ABX or other blind test, anyway.
e.g. to compare file1 with file2, randomly create a bunch of copies of both (e.g. 10 copies of file1 and 10 copies of file2), label them a / b / c / d / e etc. Keep a log of which letter is a copy of which file, but set it up such that you don't know which is which. You could do this with a simple script or maybe just have somebody else rename files for you and keep the list without letting you know. Then listen to a and compare it to file1 and file2, guess which one it is. Do the same for b, then c, etc. Don't even need to use the dreaded foobar...
As for confirming masters, I'm not sure what kind of detective work, looking up sources of releases -> guesswork is superior to actually looking at the files in an audio editor, seriously.