Most studios used for master recordings are independent of the labels. In Nashville, there are a few studios owned by some of the publishing companies (which are affiliated with the major labels), but they're not used for records - It doesn't make sense to lock them down for weeks at a time when they can get 50 different sessions in over the same period. Studio selection is usually up to the Producer - I can't imagine a producer sitting down while the label dictates which studio that a band has to use. Some of the best studios in the country were owned by labels in the past (A&M in Los Angeles, RCA Studio B in Nashville), but they've long since dumped them.
Most studios used for master recordings are independent of the labels. In Nashville, there are a few studios owned by some of the publishing companies (which are affiliated with the major labels), but they're not used for records - It doesn't make sense to lock them down for weeks at a time when they can get 50 different sessions in over the same period. Studio selection is usually up to the Producer - I can't imagine a producer sitting down while the label dictates which studio that a band has to use. Some of the best studios in the country were owned by labels in the past (A&M in Los Angeles, RCA Studio B in Nashville), but they've long since dumped them.