Get Kuijken's Bach cantatas set in one Spotify playlist: Bach Cantatas - Kuijken (310 tracks, total time: 15 hours). Ctrl (CMD) + G to browse in album view. An earlier Kuijken/LPB/Accent recording of Bach's cantatas for solo voices is not part of the series, but I included it at the end of the playlist. More links: discussions on this set at Bach Cantatas; a video of La Petite Bande Live at Ambronay 2009.
I made playlists for the other six complete sets of Bach cantatas in 2010: Rilling, Suzuki, Gardiner and Harnoncourt & Leonhardt, Leusink, Koopman (check out those posts for useful links). At that time many recordings were missing on Spotify; now every released recording from those sets are available, and the playlists were updated (if you already subscribed to them, they will update automatically in your place).
Playlists for the other six sets:
Bach Cantatas - Gardiner (1119 tracks)
Bach Cantatas - Harnoncourt & Leonhardt (1239 tracks)
Bach Cantatas - Koopman (1518 tracks)
Bach Cantatas - Leusink (1219 tracks)
Bach Cantatas - Rilling (1143 tracks)
Bach Cantatas - Suzuki (1213 tracks)