Is this unit's data compatible with the databases of Serato ITCH, Scratch Live, and Serato DH Intro?

Yes, it is compatible.

If you are already using DJ software (ITCH, Scratch Live, or Serato DJ Intro) and have already created track libraries, the track libraries you have previously created can be used as is.

If you are using Serato DJ Intro and have already created track libraries, you may have to reanalyze the tracks.