Pair claiming inheritance through Prince’s brother say they don’t need more testing
Star had been found unresponsive in a lift at his Paisley Park home
Tributes were led by Drake's uncle Larry Graham
Item has a opening bid of $30,000 (£20k)
Reports since singer's death have suggested he suffered from chronic hip pain
Wonder also admits that he had made love to Prince's songs
Late singer visited Dr Michael Todd Schulenberg twice in the weeks leading to death
'Prince Act' was introduced in the Minnesota House of Representatives on Monday (May 9)
Move comes to prevent false inheritance claims
The late musician's DNA has also been sampled to prevent false paternity claims