I read a posting on another forum by a guy (a musician) who had uploaded his files to Deezer and then downloaded them and he found they were indeed "bit-perfect" without any mumbo-jumbo changes. Perhaps Qobuz is the same.
Yes. Qobuz says its files come from the record companies and that it makes no changes to them.
I like Tidal's interface and catalog just fine ... but I've read where the Hi-Fi tier of CD quality often gets you files that had MQA but with it stripped out. They sound OK, but are not "bit-perfect".
The MQA files aren't "bit perfect" either, right? After all, they're lossy.