This reads like a "who's who" of the Motown label.  Marvin Gaye, The Miracles, The Temptations, The Supremes, The Four Tops and Stevie Wonder are among those featured on a 2-CD themed box set titled Motown 1963 Unreleased. 

It features 53 tracks from those stars you know, with songs you likely DON'T know.  A quirk in British copyright law that led to last year's releases of Beatles and Beach Boys rarities has also resulted in this release.

If you're looking for "new" 60s Motown material, this is the closest you'll come--until a year from now, when there'll likely be another box set of songs put on sale primarily so their copyrights do not expire.