I haven't had this much fun since the mid seventies. Thanks!
Another site (discogs.com) reveals more credits info for the original 45 release, including authors:
Label: Carrere
Catalog#: 49.115
Format: Vinyl, 7"
Country: France
Released: 1975
Genre: Electronic
Style: Disco
Notes: L.Melwing- M.Ambruster
[if my info is to be trusted, the first initials should fill out as Larry (Melwing) and May (Ambruster) and some web listings also include 'P. [Peny...or Penny] Duc' as collaborator, as well as a mysterious character known only as 'Brains' programming the synth, I think.
PS Further perusal of the discogs site brings to light the alleged musical 'brains' of the organization:
Stefan Klinkhammer, a prolific euro-disco maestro who worked with famous groups of the day like Boney M. and Silver Connection. Discogs characterizes Hot Blood as a 'German studio act'.
As to euro-cult connections: the main one is that many, many Italian and French and German movies of all genres ca.1975-1977 had soundtracks doing some version of the 'Munich Hustle', German disco sound often helped along with reminiscences of T(he)S(ound)O(f)P(hiladelphia) and doses of Simonetti-like prog]
and here's a link to the original sleeve (won't let me post the pic here directly)
Soul Dracula