Ah, I've just read this - https://www.historicenvironment.scot/about-us/news/retiral-of-hes-web-services/ - which says "As of 24 June 2025 Canmore, Scran and ScotlandsPlaces will be switched off" because they've moved everything to trove ... luckily canmore addresses will redirect to their new permanent(?) home at trove