How do you find out which OTR Old Time Radio series are public domain and which are still copyrighted?

The vast majority of OTR would be protected, as sound recordings have especially convoluted copyright durations. According to the Hirtle chart (http://www.copyright.cornell.edu/public_domain/), no sound recordings will enter the public domain until 15 February 2067.

First answer by Gospodyina. Last edit by Gospodyina. Contributor trust: 48 [recommend contributor]. Question popularity: 5 [recommend question]

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