According to CardinalTrap from Rocket League Fandom: It is a special title that was distributed to the winners of the Drive Days fan art contest held by Psyonix during Season 10. Psyonix originally stated there were to be 4 winners of the contest but generously selected 6 winners where the players Daventus, Destiny, Ethnogeny, Hurricane, TallAle and CardinalTrap itself won the contest.

Source:
https://rocketleague.fandom.com/wiki/Title?commentId=4400000000000049861
https://www.rocketleague.com/de/news/drive-days-community-contest-conclusion/