Apparently rapper Jay Z is in a legal battle over something very similar, though it seems Youtube didn't see it as copyright back in April https://www.theverge.com/2020/4/28/21240488/jay-z-deepfakes-roc-nation-youtube-removed-ai-copyright-impersonation
LDR is right, this issue is something to consider the legal ramifications of if only to find a possible way to prevent problems later on.