www.makemkv.com

Ok, problem solved... >> gpg --verify makemkv-sha-1.12.0.txt gpg: Signature made Sun 04 Feb 2018 00:39:06 CET gpg: using DSA key 94E3083A18042697 gpg: Good signature from "MakeMKV (signature) <support@makemkv.com>" [unknown] gpg: WARNING: This key is not certified with a trusted signature!...

(offtopic: my post is not showing)
ontopic:
The sha256 sums agree perfectly! The problem is that the pgp signature of the file containing the reference hashsums seems to be corruted. Therefore the given reference hashsums are not trustworthy...

I just noticed that there exists a pgp signed checksum file at https://www.makemkv.com/download/makemkv-sha-1.12.0.txt After adding the PGP public keys I found on a trustworthy key server ( https://pgp.mit.edu/pks/lookup?search=makemkv&op=index ) >> gpg --import gpgpubkey_mike.txt gpg: key 70A11...

So according to the waybackmachine this change was made at some time after the 4th of February 2018. The current version 1.12.0 of MakeMKV was released on the 3.2.2018... https://web.archive.org/web/20180202085234/http://makemkv.com/favicon.ico https://web.archive.org/web/20180214014139/http://www.m...

is the momentary /favicon.ico just some gimmick or have you been hacked? - just asking before I sudo make install and run....