Not sure of the exact format from the B2, but if it's n + space + artist name, this horrible looking formula should work if you copy and paste it into a spare column.
=TRIM(RIGHT(A2,LEN(A2)-SUM(LEN(A2)-LEN(SUBSTITUTE(A2,{"0","1","2","3","4","5","6","7","8","9"},"")))))
Change the A2 for the cell of the first artist and propagate down for all rows. Then you can copy and paste values for the entire column.
Hope it does the trick, sure there must be a better way, but it worked well for a column of addresses I tried it on.