Verify any round yourself
Most sites ask you to trust a result. This one asks you to look it up. A round is a public Binance candle, and checking one takes a single HTTP request with no key, no account and no permission from us.
The request
Each finished round publishes the open time of its candle — a Unix timestamp in milliseconds. Hand that to Binance's public market-data endpoint:
curl "https://data-api.binance.vision/api/v3/klines\
?symbol=BTCUSDT&interval=5m&startTime=1789928700000&limit=1"That host is Binance's own no-authentication mirror for market data. Nothing in the request identifies you, and nothing in it comes from us except the timestamp you are checking.
Reading the answer
A kline comes back as an array of fields. Two of them matter:
[[
1789928700000, // 0 open time — the round
"81182.25000000", // 1 OPEN → the price to beat
"81272.01000000", // 2 high
"81182.25000000", // 3 low
"81271.20000000", // 4 CLOSE → decides the round
...
]]This is a real candle: 2026-09-20, 18:25 UTC. It opened at 81,182.25 and closed at 81,271.20 — up $88.95, so Up won that round. If our page says anything else about that candle, our page is wrong, and you can see it in one line.
| On our page | In the kline |
|---|---|
| Price to beat | field 1 — open |
| Closing price | field 4 — close |
| Result Up | close > open |
| Result Down | close < open |
| Refunded | close = open |
Or let the page do it
The round history on the market carries a Verify button on every finished round. It does exactly the request above — from your browser, not from our server — and tells you if the two disagree. The point of running it client-side is that our server is not in the loop: the answer comes to you from Binance directly.
What this does and does not prove. It proves the round was settled on a real, public, independently-published price that we cannot move — no seed, no commit-reveal, no promise about a random number generator, because there is no random number generator. It does not prove anything about the price you were sold a side at. That is a separate question, and it has its own page with the arithmetic.
Why a candle, and not a random number
"Provably fair" normally means a hash chain: the house commits to a seed, reveals it later, and you check the result was not changed after the fact. It works, but it still ends with a number the house made up.
A Binance candle is made by a few billion dollars of other people's trading. It existed before the round did, it is on every chart in the world, and thousands of people who have never heard of this site are watching it settle in real time. There is nothing to commit to and nothing to reveal.
Open the live market