It seems to me that the content identification works as advertised: it's the metadata that is missing essential information due to inadequate process.
If Youtube knew that the author is Bach and not Sony it would know not to flag the soundtracks featuring Bach songs.
However, the problem is that at some point Sony lied to Youtube and claimed ownership of these songs even though they are in public domain. So there should be reviews or penalty for flagging copyright on someone else's works.
Sony could claim they have copyright on the very Bach recording they uploaded themselves but if content id system can't differentiate between Sony's Bach and anyone's Bach, then for practical purposes there probably aren't much basis for the recording to be eligible for a copyright by Sony.
If Youtube knew that the author is Bach and not Sony it would know not to flag the soundtracks featuring Bach songs.
However, the problem is that at some point Sony lied to Youtube and claimed ownership of these songs even though they are in public domain. So there should be reviews or penalty for flagging copyright on someone else's works.
Sony could claim they have copyright on the very Bach recording they uploaded themselves but if content id system can't differentiate between Sony's Bach and anyone's Bach, then for practical purposes there probably aren't much basis for the recording to be eligible for a copyright by Sony.