Why Preuval exists

Trust is broken in crypto trading

Scroll any trading timeline. Every account is up. Every signal group posts the winners. Every fund manager has a chart that only goes one way. Statistically, most of it cannot be true — and everyone reading it knows that, which is exactly the problem.

The evidence circulating in this market is images. A screenshot of a position. A screen recording of a dashboard. An exchange PnL card, which shows precisely the window the trader selected and nothing on either side of it. None of these are records. They are renderings — and a rendering can be edited faster than it can be checked.

So capital gets allocated on vibes. Copy-trade platforms rank traders by performance the traders themselves report. Prop firms read application forms full of claims nobody can test. Investors wire money because someone seemed credible in a Telegram group, and funds get raised on charts that were never reconciled against a single exchange record.

The people paying for this are the honest ones. If a real 40% year and a fabricated 400% year look identical on a phone screen, the trader with the real track record has nothing that distinguishes them. Their proof is the same format as everyone’s lie. So nobody believes anyone, and the whole market prices in the assumption that you’re making it up.

exchange dashboard · screenshot source1 keystroke from a lie

Account equity

$4,206.31

+11.6% all time

This is a mock dashboard. The point is that the real one behaves exactly the same way.

Four ways a track record gets faked

Inspect element

Open dev tools on any exchange dashboard, double-click the balance, type a bigger number, screenshot. Thirty seconds, no skill required. The screenshot is pixel-identical to a real one.

The winning slice

Post the two green weeks, never the month that erased them. Nothing in the image is edited — the lie is everything cropped out of frame.

Demo account, real caption

Testnet and demo accounts render the same interface as live ones. A 300% run on play money looks exactly like a 300% run on real money.

Paper claimed as live

Backtests and TradingView paper fills posted as executed trades. No slippage, no funding, no liquidation — a track record that never touched an order book.

The verification gap

It is not that nobody has tried. Four categories of tools touch this problem, and each is good at something real. None of them independently verifies a centralized exchange perp record — that is the gap.

Screenshots and screen recordings

what it does well: Instant, universal, and free. Everyone already knows how to read one.
where it falls short: They prove what a browser was told to display, nothing more. Dev tools rewrite any number on any dashboard, and a recording just adds motion to the same editable pixels. There is no way to check one, which means there is no reason to believe one.

On-chain analytics — Nansen, DexCheck, Arkham

what it does well: Excellent at what they do. On a public ledger every position is already a matter of record, and these tools read that record extremely well.
where it falls short: Their visibility ends at the exchange door. The overwhelming majority of perpetual futures volume trades on centralized venues — Binance, Bybit, OKX, Bitget, BloFin — where nothing settles on a chain. An on-chain explorer cannot see a single CEX fill, and CEX perps are where most traders actually build a track record.

Trading journals — Kinfo, TraderSync

what it does well: Genuinely useful for the trader: broker sync, tagging, statistics, reviewing your own decisions over time.
where it falls short: A journal displays what its data source reported. It does not independently recompute the account or test whether the imported trades actually produce the imported balance. Trust flows through it unchanged — if the data going in is shaped or partial, the polished chart coming out is shaped or partial too.

Exchange leaderboards

what it does well: A real signal about real accounts on that exchange, and a fast way to discover active traders.
where it falls short: Opt-in only, so you see the traders having a good quarter. Often built around a competition, which rewards risk that nobody would run with their own capital. And the exchange is scoring itself — there is no artifact you can take elsewhere and check. They are marketing surfaces, not audit surfaces.

the missing piece

Independent, cryptographic verification of centralized-exchange perpetual futures records. Not a prettier display of what the exchange said — a separate engine that pulls the raw events, recomputes the account from them, checks its own answer against the exchange’s balance, and seals the whole thing so any later edit is detectable. That is the only part of this problem nobody else was covering, and it is the only thing Preuval does.

What “independently verified” actually means

Five steps, in plain language. You do the first one. The engine does the other four, and does them the same way every time — which is the whole reason the result can be checked by someone who doesn’t trust you.

step 1
You connect a read-only key
You create an API key on your exchange with trading and withdrawal permissions switched off, and paste it in. The key can look at your history and nothing else — it cannot place an order, close a position, or move a dollar. That is not a policy promise; it is what the exchange itself allows that key to do.
output
permissions: read
trade: ✗ disabled
withdraw: ✗ disabled
step 2
Every raw record comes across
The engine pages through your primary records and stores each response exactly as the exchange sent it — every fill, every funding payment, every deposit and withdrawal, every balance snapshot. Nothing is summarized on the way in, and every file is hashed before a single number is computed.
output
fills 1,284 records
funding 902 records
transfers 17 records
balance snapshots 90 records
step 3
Your equity curve gets rebuilt from scratch
This is the part that makes it verification rather than display. The engine does not copy the exchange’s PnL figures. It replays your account event by event — entries, exits, average price, fees, funding, transfers — and computes what your equity must have been at every point, using exact decimal arithmetic instead of floating point, so the math is the math an auditor would do by hand.
output
realized = (52,105.00 − 51,240.50) × 0.42
= +363.090
equity = Σ realized − fees + funding + transfers
step 4
The two answers are compared
The independently computed equity is checked against the exchange’s own balance snapshots at each point in time. If they agree, the record is internally consistent: the trades you are showing genuinely produce the balance you are claiming. If they diverge, the report says so, and by how much. A failed reconciliation is a result, not an error.
output
t computed exchange Δ
03-14 00:00 12,408.13 12,408.13 0.00 ✓
04-02 00:00 13,911.07 13,911.07 0.00 ✓
step 5
Everything gets sealed
All of it — the raw file manifest, the time window, the mode, the engine version, the computed curve — is serialized in a fixed order and hashed into a single SHA-256 seal. Run the verification again on the same data and you get the same seal, every time. Change anything at all and you get a different one.
output
seal e3a1c9f2b06d5a88…9d02f14b7d

same inputs → same seal, always

Proof that works everywhere

A verified report is a URL. It survives being forwarded, embedded, pinned, and attached to an application — and it means the same thing to everyone who opens it.

For traders building a reputation

You run a profitable strategy on Bybit and you want followers, copy-traders, or a seat at a prop firm. Instead of posting screenshots nobody trusts, you send one verified report link.

Whoever opens it sees your independently computed equity curve, how your recomputed balance reconciled against the exchange’s own snapshots, and a cryptographic seal they can check themselves. You stop arguing about whether your numbers are real and start talking about the strategy.

screenshot → sealed link

For prop firms and allocators

An applicant claims 40% over six months on Binance. Rather than trusting the claim or squinting at images, you require a Preuval report as part of intake.

You see the actual trade count, the real drawdown along the way, whether the exchange balance agrees with the independently computed equity, and a seal proving the record was not edited after the fact. Diligence that used to take a week of back-and-forth is one link.

claims → reconciled records

For copy-trade and social platforms

Your product ranks traders so other people can copy them. Today that ranking rests on self-reported performance or exchange-supplied numbers that can be gamed — and one blow-up on your leaderboard is your reputation, not theirs.

Require verification and every ranked trader carries an independently computed score your users can re-check. Verified traders attract more followers, fakes have nowhere to stand, and trust stops being a marketing claim and starts being a feature you can point at.

leaderboard → verified leaderboard

For signal providers and educators

You sell signals or teach a course. The single question every prospective student has — do you actually trade this, or do you only teach it? — is the one you currently cannot answer with anything but your word.

A verified report answers it before they ask. Put the badge on your sales page, pin the link in your Telegram, drop it in your bio. The people who are only teaching cannot follow you there, and that difference becomes visible to your audience.

claims → checkable proof

The seal, demonstrated

Three fills go in. Sixty-four characters come out. Change one digit of one price and watch how much of the seal changes with it — the hash on the right is computed live in your browser, not a stored picture of one.

A real seal covers far more than three trades. It commits to every raw file pulled from the exchange, every funding payment, every deposit and withdrawal, the time window, the verification mode, the engine version, and the entire recomputed equity curve. All of it, in one fingerprint.

Which leaves nowhere to hide. You cannot quietly improve one trade, because the seal would no longer match. You cannot start from a flattering seal and work backwards to data that produces it. The only way to have a seal is to have the data it came from.

sealed inputssha-256 · computed in your browser

Three sample fills used as the input to the demonstration seal
time	symbol	side	qty	price
03-14 09:12	BTC-USDT	buy	0.42	51240.50
03-14 15:48	BTC-USDT	sell	0.42	52105.00
03-16 02:31	ETH-USDT	buy	1.10	3120.75

verification sealmatches

computing…

One digit. Watch what happens to the seal.

Your track record is real. Now prove it.

One read-only key, a few minutes, and a link that answers the question before anyone has to ask it.

Read-only API keys only. We never place trades or move funds.