Verified betting record

What "tamper-evident" actually means

When you commit a bet, Flamia writes it into a hash chain: each entry carries a cryptographic fingerprint of the one before it. Change any earlier record — edit a stake, delete an embarrassing loss, backdate a win — and every fingerprint after it stops matching. The tampering does not need to be caught by us. It is detectable by anyone checking the chain.

This is a deliberately modest claim, and worth stating precisely. It does not prove you placed a bet with a bookmaker; it proves that the record you are showing today is the record you committed then, unedited. That is the part people actually lie about.

Why a spreadsheet can never do this

A spreadsheet is an excellent private tool and worthless as public evidence, because its editability is the entire point. There is no way to distinguish a spreadsheet that has been maintained honestly from one that has had its worst rows quietly removed — not by looking at it, and not by exporting it. The same applies to a screenshot, a PDF, or a dashboard that lets you delete history.

A signed ledger changes the default. Instead of asking people to believe you, you hand them something they can check.

• Every committed slip is hash-chained at the moment it lands.
• Edits after commit are detectable rather than prevented — you keep control, you just cannot rewrite history invisibly.
• The public profile is generated from the signed ledger, not from figures you enter separately.
• Full export of every bet remains available; verification does not mean lock-in.

Where this matters

For most bettors, verification is a private discipline: it stops you from flattering yourself, which is the most common failure in self-reported records. For anyone whose reputation is the product — tipsters, syndicate members, people applying to a betting fund — it is the difference between a claim and evidence.

Frequently asked questions

Does this prove I actually placed the bet?

No, and we are careful not to claim it does. It proves the record has not been altered since you committed it, and that bets were recorded before their outcomes were known. Proving a wager existed at a bookmaker is a different problem that no tracker can solve without the bookmaker.

Can I delete bets?

You keep control of your data and can remove entries. What you cannot do is remove them invisibly — the chain reflects that something changed. That is the intended behaviour: privacy over your record, without the ability to silently launder it.

Is my betting history public by default?

No. Everything is private unless you deliberately publish a profile, and you choose what that profile exposes.

Do I need to understand hashing to use this?

Not at all. It runs automatically on every committed bet. The mechanism only becomes relevant when someone wants to verify your record, at which point it does the work for you.