The image which shows ‘666’ and a pentagram was found by Reddit user TomButcher.
Here you can hear the song:
The composer of the Doom soundtrack Mick Gordon showed a teaser of the hidden imagery in the video below (3:29).
Now I can’t help but wonder where he might have found inspiration for this. Could it be that he followed the whole “11BX1371“ thing? I have reached out to him for a comment, and will update this post if I hear back from him.
Either way it’s pretty cool that these kind of things are gaining in popularity. It certainly adds another dimension to different artforms (music, games, videos).