For reference, a priority list of where to get song titles (as I went through this issue with one of my maps)
From highest to lowest
1) Composer/Band's official website
2) Official album listing (aka. Either from a purchased album, or a site that sells the album (ie. iTunes))
3) Composer/Band's wiki pages. (Assuming the wiki is a decently active wiki. Fanmade wikis that are mostly dead are generally not reputable sources)
4) Unofficial music databases. (Which is what most people would tend to use, especially for foriegn music)
5) Wikipedia page.
6) Unofficial album listing (aka. A site that you can download the album from, but is not officially sold by the composer/band)
7) Youtube video listing (This is mostly useful for things like youtube poops or fanmade things that don't really have a home outside of youtube)
NOTE: This is by no means official I just made it off of the top of my head so tear it apart all you want. Also be aware that different situations call for different things, but this is what I'd generally think in terms of credibility.
And for reference, Because a previous map has a title does not mean its right I'm aware that there was a rule for consistency way back in 2012 where people would put wrong metadata so things would be consistent, but now we've moved past that, and rather than keep on making the same mistake over and over again, we need to like, actually fix things. I'm not sure how the progress is on osz2 and the magical "oh it'll fix every title", but the least we could do is at least start that now so it's less work in the future. I don't know if that needs to be worded into the rule, or if it should just be on the "Don't be stupid" clause.
It should also be in the best interest of reputable modders as well as all BATs to start looking at this stuff prior to qualifying, even if it seems trivial, so we don't have incidents like the one that has lead to this happen again.
Completely supporting this rule tho.