According to the Hirtle list, maintained at Cornell University, sound recordings fixed in the US prior to 15 Feb 1972 do not enter the public domain until 15 Feb 2067. http://www.copyright.cornell.edu
The song itself is in the public domain, but certain settings, adaptations, performances, and recordings may still be protected.
Yes, although certain editions, performances, and recordings may still be protected.
The carol itself is in the public domain, but certain arrangements, performances, and recordings can still be protected.
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.
Published in 1835, "The Alphabet Song" itself is in the public domain; certain arrangements, performances, or recordings may have their own rights.
The song itself is in the public domain, but certain arrangements, performances, and recordings have their own protection.
No; recordings by SICSbeats are protected by copyright.
An extensive list of songs in the public domain (in the US) is linked below. It's much harder to find public domain recordings, as the copyrights for sound recordings are especially convoluted.
Unfortunately, no; prior to 1978, sound recordings were protected by state law rather than federal law. The earliest any sound recordings will enter the public domain is February 15, 2067.
The song itself is in the public domain, but certain settings, performances, and recordings may have their own protection.
The work itself is in the public domain, but certain transcriptions, adaptations, performances, and recordings may still be protected.
The song itself is in the public domain, but certain settings, arrangements, performances, and recordings may have their own protection.
The song itself is in the public domain, but certain arrangements, performances, and recordings are still protected by copyright.
The song itself is in the public domain, but certain arrangements, performances, and recordings may still be protected.
The song itself is in the public domain, but certain settings, performances, and recordings may still be protected.
The song itself is in the public domain, but certain settings, arrangements, performances, and recordings can have their own protections.
The song itself is in the public domain, but certain performances and recordings may have their own protection.