After many emails I can now say that the classical music on this site is usable for Solo & Ensemble and there is a letter you may download which will show that you have the right to use the music for free.
To celebrate I have uploaded my arrangement the entire first Bach Suite (BWV 1007) to the site. I have focused a lot on the Anna Magdalena Bach manuscript. I plan to do the other suites in the future.
Finally, I have gotten word that I am now on the list for musicians that are contacted when groups like the Trans-Siberian Orchestra are in town.