Jem Aswad Senior Music EditorThe song-catalog bonanza of 2020 just hit a peak that is not likely to be topped: Universal Music Publishing Group has acquired Bob Dylan’s entire catalog of songs in a blockbuster agreement encompassing more than 600 copyrights spanning 60 years, ranging from 1962’s “Blowin’ in the Wind” to this year’s “Murder Most Foul.” His catalog was previously administered by Sony/ATV Music Publishing.Terms were not disclosed, but a source tells Variety that the deal was