Whose car is it and who should be using the car?

Hi, so I bought a car recently but it's under my brother's name. I paid in full with my hard earned money. I am also paying monthly for it. It's under my brother's name because he has a better credit score than me and because I still only have my permit. I am the cosigner. However, he uses it more than me. To get to work, to his friend's house etc etc while I use my dad's car. I think it's unfair because I bought it for me to use but he says it's under his name. Who has the right?
Whose car is it and who should be using the car?
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