In the US, you cannot claim copyright on any work devoid of any creative intent. A phone book is not copyrightable, but the specific fonts and organization can make a given phone book copyrightable. Organized trivia isn't copyrightable, but the expression is. There's no expression with an extensive corpus.

It also wouldn't matter. The existence of the corpus doesn't change the copyrightability of other works. You'd still have to convince a jury it was more likely you were inspired by the corpus than the hit song whose melody is identical.