Board Thread:Questions and Answers/@comment-72.45.204.82-20140804195352/@comment-5290733-20140805060920

>alot of the time it says "I got permission to cover said song from said producer"

I've seen a lot of utattemita in my life, and I have never seen a video claim such a thing unless it was a non-vocaloid song, and even those rarely have a declaration like that.

You may be encountering a common mistranslation of the humble form of "to sing", which can also mean "was allowed to sing", but other than that, I have no idea what you're talking about.

Covers of songs with publicly available instrumental tracks are absolutely legal, and some more-well-known producers such as HoneyWorks even have notices on their communities in reaction to some well-meaning utaite: "You need not ask permission to cover our songs."