The gradually expanding credits for Beyonce‘s Cowboy Carter album have revealed a deeper Beatles connection with her cover of “Blackbird.” Beyonce’s update was built on instrumental elements from the original master recording of the song from 1968’s White Album, including Paul McCartney‘s foot tapping and acoustic guitar. A McCartney representative confirmed the news to Variety, citing Beyonce’s team. McCartney is officially listed as guitarist and co-producer on the track. Beyonce’s version also includes strings, violin and bass credited to fellow co-producer Khirye Tyler. Stevie Wonder‘s con…