TU Dresden Article about it. https://tu-dresden.de/ing/informatik/sya/ps/chair/news/geheime-daten-auf-dem-druckpapier-diplominformatiker-der-tu-dresden-entwickeln-verfahren-gegen-druckerueberwachung
It has a link to the App that decodes, what being embedded in the print and anonymize the prints, by scrambling the yellow dot patterns. https://dfd.inf.tu-dresden.de/
I went to a small concert and you could buy their music on a flash drive. That was awesome. I like that option
At a anime convention there was a table with various CDs of the band playing that night. I couldn’t go to concert, but bought a CD to support them even though it was going to be a slight inconvenience to rip it. I still have all my old CDs (I don’t really have that much so haven’t gotten rid of them. I keep them in a plastic container) so just put it with the rest.