No. they don’t upsample. In short words: It’s real.
In longer words: I have 21 ACT-Albums, 15 are HiRes. I just did a test with Lossless Audio Checker (Lars Danielsson & Paolo Fresu - Summerwind)
The Album:
The check says it’s clean. What means that it’s not upsampled.
The logfile:
Lossless Audio Checker 2.0.7 logfile from Thursday 24 January 2019 06:53:08 PM
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[01] Lars Danielsson & Paolo Fresu - Autumn Leaves.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[02] Lars Danielsson & Paolo Fresu - Saluto Dardamente.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[03] Lars Danielsson & Paolo Fresu - Le Matin.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[04] Lars Danielsson & Paolo Fresu - Stilla Storm.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[05] Lars Danielsson & Paolo Fresu - Jag Lyfter Ögat Mot Himmelen.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[06] Lars Danielsson & Paolo Fresu - Un Vestido Y Un Amor.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[07] Lars Danielsson & Paolo Fresu - Drexciya.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[08] Lars Danielsson & Paolo Fresu - Dardusó.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[09] Lars Danielsson & Paolo Fresu - Stanna Tid.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[10] Lars Danielsson & Paolo Fresu - Sleep Safe And Warm.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[11] Lars Danielsson & Paolo Fresu - April In Dardegna.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[12] Lars Danielsson & Paolo Fresu - Amigos.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[13] Lars Danielsson & Paolo Fresu - Wachet Auf, Ruft Uns Die Stimme.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[14] Lars Danielsson & Paolo Fresu - Dardodentro.flac
Result: Clean
File: D:\Musik\General Jazz\Lars Danielsson\2018 Summerwind[15] Lars Danielsson & Paolo Fresu - De La Solitude Mesurée.flac
Result: Clean