Current Signal fortunately doesn't make this apparent to the end user, it's install and go message whomever advertises support.

I'm ditching Pidgin-OTR today actually because of the OTR usability issues needing to handshake on every laptop restart. Will be going over to bitlbee terminating OTR on a server and then accessing my ZNC supporting push through TLS. Much less jarring.

OMEMO would be better than OTR for this, but not much supports it yet.