Missing metadata while playing songs on PC downloaded through Mix Radio

[Vignesh B]

I use the Mix Radio functionality provided on my Lumia 525 and download music through it. Now when I transfer the music to my PC, the songs play in only Windows Media Player and the modern Music app(unsupported file format error is shown on other players). But they do not contain any metadata of the songs like album cover, artist etc. But the same are available in the Music app on my phone.
I can't even find the details of the songs using Windows Explorer. Are they hidden in some other partition on my phone from where I should copy them?