Without knowing about the R30, I'd guess it would add copy protection to your master. But I'd also guess that the computer and s/w you use to make the sound file from the spdif stream won't pay any attention to the SCMS status bit. And the Tascam isn't trying to make a digital clone (which SCMS tries to prevent), it is just playing back the master recording with a digital output (functioning no different if the tascam were playing back the master and outputting digitally to an external DAC).
Bottom line, that should work fine would be my guess.