Jesu meine Freude, BWV Anh. II 58

Since I started transcribing the works from BWV Anhang II (the list of works that are possibly composed by Johann Sebastian Bach, but the authorship of which is uncertain) I read a bit more about these spurious works. There are a lot more of them than I knew. The list of possible works goes beyond the BWV-catalogue, some works are catalogued as not having a BWV number (hence called BWV deest) and some of works are listed in other catalogues, like Emans. So, although the organs works in BWV Anhang II go on to number 79, reaching that number won't mean the end of this series of possible organ works by J.S. Bach.
The last published work in this series was BWV Anh II 54 (http://www.contrebombarde.com/concerthall/music/26319). BWV Anh II 55 I already published one and a half years ago (http://www.contrebombarde.com/concerthall/music/20296). The numbers 56 and 57 are known these days to be composed by Telemann and Vogler respectively.
Regrettably, I do not have a manuscript source for this work. I based this transcription on a midi-file I found online. I'm not sure what this means for copy rights. The midi was probably based on a commercial edition, now I transcribe the midi back to written music. Do I infringe the copyright of the original edition or not? I do not know what edition that was, yet that's perhaps not an excuse. So it is a bit reluctantly that I put up this score.
The music itself is a very good prelude to the famous melody of "Jesu meine Freude". I quite like the triple meter that Bach (?) uses for the accompaniment. The elegant way the music moves harmonically lends credebility to Bach as author.

Score available here: http:\\partitura.org/index.php/johann-sebastian-bach-jesu-meine-freude-bwv-anh-ii-58/