Scotch whisky labels contain the exact words “Scotch whisky”; “Whisky” is sometimes capitalised. If the word “Scotch” is missing, the whisky is probably made elsewhere. If it says Scotch “whiskey” or “Scottish” whisky, it might well be counterfeit.
If a label contains the words “single malt” (sometimes split by other words e.g., “single highland malt”), the bottle contains single malt Scotch whisky.
“Vatted malt,” “pure malt,” or “blended malt” indicates a mixture of single malt whiskies. In older bottlings pure malt is often used to describe a single malt (e.g. “Glenfiddich Pure Malt”).
The label may identify the distillery as the main brand or as part of the product description. This is most likely the case for single malt. Some single malt whisky is sold anonymously or with a fictitious brand name. This does not indicate quality, but successive bottles may be completely different. The only reliable way to identify the distillery is to use a reference.