I didn't know the song and didn't realize the solution was just as easy as looking up the sequence of numbers in order (including that sneaky 0...)
So, fun fact: If you consider OCANADA as a non-theme entry and then completely ignore the one asymmetric theme entry (SIXPACK) you're left with five numbers (3, 5, 7, 8, 9). If you take the words in those positions from the lyrics of O CANADA (our, and, land, true, patriot) and then UNSCRAMBLE the first letters, you do get a first name... PLATO. But of course that's waaaaay outside the (Pandora's) Box.