OTCMarkets  https://www.otcmarkets.com/stock/ZHCLF/security
When you scroll down (the link), you will see the following:
"Foreign Stock Exchange Listing
ZENI | TSX Venture Exchange."

I called the OTC Markets folks this morning.  Looks like they removed this:

"Foreign Stock Exchange Listing
ZENI | TSX Venture Exchange."

I asked them to look into whether shares trading as ZHCLF are ZCC Calgary or ZCC Vancouver.  I'm not overly optimistic we'll see any improved clarity on it.