diff --git a/plugins/commands.py b/plugins/commands.py
index 654c5b3..a21c5db 100644
--- a/plugins/commands.py
+++ b/plugins/commands.py
@@ -108,9 +108,9 @@ def showchan(irc, source, args):
     if c.topic:
         f('\x02Channel topic\x02: %s' % c.topic)
 
-    if irc.proto.hasCap('has-ts'):
-        # Clientbot-specific hack: don't show channel TS because it's not properly tracked.
-        f('\x02Channel creation time\x02: %s (%s)' % (ctime(c.ts), c.ts))
+    # Mark TS values as untrusted on Clientbot and others (where TS is read-only or not trackable)
+    f('\x02Channel creation time\x02: %s (%s)%s' % (ctime(c.ts), c.ts,
+                                                    ' [UNTRUSTED]' if not irc.proto.hasCap('has-ts') else ''))
 
     # Show only modes that aren't list-style modes.
     modes = irc.joinModes([m for m in c.modes if m[0] not in irc.cmodes['*A']], sort=True)