I ran into this release group while looking at the artist:
Under this we have 2 releases, both digital, with different barcodes. So, simply put, how do I know which one, for example, to add the Amazon reference to? Digital releases, although are normally assigned a barcode, do not display said barcode to its users and/or owners like it does on physical mediums.
I can verify that iTunes recognizes the one that it is used as a reference on, but what about the other references? I am not asking anyone to verify, I am asking in general, how do I the user know? If I want to add a new reference, how do I know which it belongs to, or would I create another release for barcode unknown? Or yet, how would I know which one I have if I am trying to identify my release? How do I even find a barcode on my digital release?
My personal feelings on this are that I do not track barcodes for digital releases. For me, I find it best to differentiate digital releases by store, thus meaning that the store name plus the stores ID number(s) for that release… which I already know MB does not want to do. My reasoning for this is that it is often quite difficult to even get a barcode for a digital release. Using iTunes as an example, I can buy the release from the store and never see a barcode anywhere. Even once I download my file(s), the metadata does not contain any barcodes. So as a release owner, I may never know what the barcode is, or even if it does have a barcode.