The first year, Motown released a series of albums packed with outtakes by some of its major acts, and Sony released a limited-edition collection of 1962 outtakes by Bob Dylan, with the surprisingly frank title, "The Copyright Extension Collection, Vol. I." In 2013, Sony released a second Dylan set, devoted to previously unreleased 1963 recordings. Similar recordings by the Beatles and the Beach Boys followed. This year, Sony is releasing a limited-edition nine-LP set of 1964 recordings by Dylan, including a 46-second try at "Mr. Tambourine Man," which he would not complete until 1965. The Beach Boys released two copyright-extension sets of outtakes last week. And while there's no official word on a Beatles release, last year around this time, "The Beatles Bootleg Recordings 1963" turned up unannounced on iTunes.