locking hdl to a particular fpga

Does anyone know if there is a way to lock code to work only on a particular
fpga? I know the device has a jtag identifier, which identifies the fpga
family, but I don't know if part of that idcode reflects a unique serial
number associated to only 1 fpga. I'm looking to write some code that
checks if the id of that fpga is valid, otherwise the code won't run.

Thanks,

-- Matt


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