I don't think it's over for CopperheadOS, but it is over for that name. Like Cyanogen changing to LineageOS, the dev who deleted his signing keys will probably just foke a new code base with a new name.
Obviously it won't be as peaceful a transition Cyanogen->Lineage, but that's my prediction for this Android variant in the next few months.
Obviously it won't be as peaceful a transition Cyanogen->Lineage, but that's my prediction for this Android variant in the next few months.