Some might object to my DSD-flash proposal (below) on the basis that untraceable copies could be made from the analog output. But the recording would most likely be converted back to digital for storage, and once that's done, the pirate patrol would have a long time to find the recordings. Where there's a will, there's a way. My attitude would be to fight underhandedness with underhandedness. Maybe the music industry could get the NSA to snoop around on our hard drives for pirate recordings, along with our other dirty laundry. If they find some, then the culprits could be nailed through some other route.
Analog storage is still possible, but I don't see why anyone would want to spend the money and and time required to make such recordings, which present all sorts of issues related to playback and degradation over time.