If you check out GDM's site you will actually find them listing Hexacord-titles under THEIR complete catalogue. Hexacord was the company releasing the Keoma-soundtrack. Also checking out the few Hexacord-soundtracks I have in my collection I notice that a couple of them are listed as being put together by Hillside.... Hillside is today found mentioned on a lot of the spaghetti western soundtracks released by dada GDM Hillside's got their own website
and under their deleted titles you will find dada the Keoma-release So that's how it is connected. The whole Italian soundtrack release stage is one inbred lot And I mean that in the most positive way.