If by true, you mean one that has the official RC logo, he doesn't have one yet, as he has yet to appear in a major league game. He doesn't appear in any "Topps" set (meaning the flagship set). He does have a 1st Bowman Chrome card in 2014, but also has an insert auto in 2013 Bowman.
Hopefully he will have a series 2 Topps rookie card. If not then my guess would be an update as I don't think they will keep him in the minors all year.
Comments
http://www.cardboardconnection.com/kris-bryant-prospect-cards