You could try this. Note the CC: is lower-case.
#+BEGIN_QUERY
{
:query [
:find (pull ?b [*])
:where
[?b :block/page ?p]
[?p :block/name ?title]
[?b :block/properties ?prop]
[(clojure.string/starts-with? ?title "cc:")]
]
:breadcrumb-show? true
}
#+END_QUERY