You have to identify fakes and upcovers yourself. Dear friends lately you can see that I mark any files as fake or upconvert. An upconvert/fake is when the low bitrate remains the same and the file size is artificially increased.
Please use Spek – Acoustic Spectrum Analyser download here for check files. just transfer the file to the working window of the program and you will see the range of spectrum.
Example
1993 – Try Another World CD-Rip
Its true 320 kbps real 20 kHZ My
DeGARMO & KEY – This Ain’t Hollywood [Digitally Remastered] (2021)
its fake from web
upconvert ~192 to 320 ~16 kHz
Valentine/Hugo – Demos from the Attic 2021
My CD-Rip 320 20 kHz
upconvert 64 to 320 ~ 12 kHz
and more.