I've had a copyright claim (as a matter fact, a couple) before. One was for a Marvin Gaye song. The man has been dead for thirty six years. Yet, there's BMI, CHA-CHING! Ready to cash in. It's fucking disgusting. As a matter of fact, I wouldn't hate it if we kept the copyright laws the way that they are now, however, they can never renew and it automatically goes to free domain.
But, at some point it has to go into free domain. Not to keep some lazy asshole sitting on his throne over at BMI or Sony.