Yes, the Unitiserve looks up the album title and song titles online. It runs through several online lookup services till it finds the title. It also picks up the cover art, performers, composers...
If the title isn't available it generates a random string of letters and numbers and you can manually rename it with the album title, song titles and the artist. The nationally known musicians and labels are always found. It's local musicians that it may miss.
By the way, the Unitiserve doesn't have a screen or remote and must be controlled by an iOS device through Wi-Fi or via a monitor. I have a couple of iPod touches that my kids don't use anymore so I use them as remotes, but iPads and iPhones are also fine. The Unitiserve's replacement the UnitiCore can also be controlled from an Android phone in addition to the iOS products. For my Unitiserve there is also a desktop/laptop client that is downloaded from the Naim website that I use to manage the HDD's database and set up a backup to my NAS.
This may sound difficult, but its all very straightforward to set up and easy to use once it's all in place.