Sure he did -- contemporary works like Bambi, Dumbo, Lady and the Tramp, Winnie-the Pooh, the Oz books, 101 Dalmatians, The Sword in the Stone, Mary Poppins (famously), he even owned The Hobbit for a while. He bought rights to "Rite of Spring" and "The Firebird" from Stravinsky, Old Yeller from Fred Gipson, he bought rights to tons of stuff. Sure, he made a lot of films based in the public domain (20,000 Leagues, Treasure Island, Kidnapped, Alice, Zorro, etc.), the Great Ormond orphanage allowed him to make Peter Pan -- I'm sure you guys know all this. When Walt had to purchase rights, he did so.