Yes. His rapper name/account is Yaris Music - the style of writing is the same as he has always had and the posts are identical to the instagram. Plus he has posted elsewhere about his accounts. This is his IG
https://www.instagram.com/yarismusic/?hl=en
https://www.instagram.com/yarismusic/?hl=en
BTW what do you mean his "RAPPER" name? Is he a rapper now?