Music income is split into two halves, the Master and the Publishing. The Master is the actual recording. In this case AF have licensed the rights to the recording. This is what record labels do. They release and exploit recordings. Publishing pertains to the music itself (the composition, historically the sheet music) which has its own avenues of exploitation separate to the recording. This is why musicians can be signed to a label (e.g. Warners) but be published by a different company (e.g. Domino)