Part of #2
A record atmosynth.at withholds, reached by its address rather than found in the explorer, is not opened or imported: Groove says it is withheld, in the words the site uses. If atmosynth.at cannot be reached, nothing is blocked and the record opens as it does today (ADR 0005). Covers Open address, and whatever an arrangement brings with it. Needs atmosynth.at to answer whether a given record or account is withheld.