I studied the monero-gui code and in the file
monero-gui/src/qt/updater.cpp I found two addresses to verify binaries:
The first file (hashes.txt) is in text format and it is clear to me that hashes and a digital signature are written there.
The second file (hashes.txt.sig) is in binary format. I have a question: what is this file and what utilities is it generated by?