OpenMarket records market data tick by tick: every trade as it prints, the finest granularity there is. Its market data engine aggregates real-time order flow and liquidity across more than 20 venues.
CME futures carry official CME Group data, live with a real-time subscription and 10 minutes delayed without one: see What do the CME data plans include?
If a candle, a volume or a book level looks wrong to you, report it through Reach out with the symbol, the venue, the interval and the time, so the team can check it against the source.