What does unbound use for upstream DNS? Couldn't figure that out looking at the article or the .conf file. I use OpenDNS for other reasons, and since they don't support DNSSEC, it seems like it would be moot. They do support DNSCrypt.
unbound is its own resolver thus giving you FULL control over your own DNS queries basically unbound becomes your upstream and doesn't need anything further upstream to function properly
So reading further, it always consults authoritative servers, which means it wouldn't use OpenDNS, and I am using some of the "value add" that OpenDNS provides, so that seems like a non-starter in my case.