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That's true. All governments, including ours of course track people through records, census data, etc.
But the nazis were famous for their meticulousness and it isn't quite clear why until you think about it and try to re-construct the purpose. It's usually protrayed in movies as a kind weird police state paranoia. Ver are your papers? It was that, too. But records can also be used as a state method of control. You belong here, and not there, etc. Under the overlording manipulation of government, records become the primary means of control and channelling behavior in both benign and malignant ways.
It's this latter aspect of record keeping that began to become a conscieous adjunct to government policies during the nineteenth century as the technical and rational means of social control as applied to society as a whole. Certainly the capitalist class was front and center on this because control of the working class, which obviously meant better control of profits and more systematic means to get more for less.
There have always been laws and courts of some sort, but this extra-judicial method moved from the control of property like land and taxes, to a much more subtle and nuanced means over people (and labor) who had no property and were not themselves property like slaves and indentured servants. In the case of the nazis, well they went haywire over it as a control method. That was my only real point.
CG