Esports prediction markets, on the record

We record esports prediction markets from our own connection and put the market and the match on one clock. Three things are built on that record, all sold to businesses:

• Match flow reports show an integrity unit or a tournament organiser what the money did around a match, tested against seven rules written before the match is read.
• Validation tests a trading strategy or a backtest before it gets capital, from a decision log alone or inside the client’s own environment.
• Data licences give a fund, desk or data vendor the Polymarket and Kalshi esports record itself, with the reference clock that joins trades to the book.

Polymarket order books and trades have been recorded from our own connection since 18 August 2026, and Kalshi from 25 August to 26 September 2026, with the venue hash and sequence preserved. That is more than 2.6 billion records of our own.

Every Polymarket fill settles on Polygon, so we tie each one to the wallet that made it and correct for the two seconds a block takes to land. We cover every hour of both venues, and every report and delivery lists exactly where its data came from. How each hour is sourced is set out under the esports record.

• Rules before data. A report’s rules and a study’s hypothesis are written down before the data is read.
• Every number reproduces. Code and inputs are hash-pinned, and each release carries the sha256 of what produced it.
• The whole search counts. A multiple-testing correction runs across everything tried, not only the winners, and a result has to hold on an untouched holdout.
• Captured, not repaired. Raw capture is immutable: nothing is inferred at ingest and nothing is quietly cleaned.
• Describe, never accuse. A match flow report says what the market did. It makes no finding of wrongdoing, and the decision stays with the body that asked.

Our own research meets the same gate. It has scored 261 candidate results, and when we found the bootstrap behind our own intervals was biased, we rebuilt it.

We trade esports prediction markets on our own account. It is why the record exists, and it is why we keep a wall:

• We do not write a match flow report on a market we traded, and the body that commissions one can have our wallet addresses under NDA to check.
• For strategies in esports prediction markets we offer the Log audit only, so model logic never reaches us.
• Every validation engagement letter commits us to non-use, to not trading the client’s strategy class in the named markets for an agreed period, to a deletion certificate, and to handing over the egress log.

21Core AI is not a sportsbook, a tipster, a signals service or a consumer trading app, and it does not sell trading strategies or access to its own trading. We hold no client capital, accept no deposits, route no orders for anyone and are not an investment adviser. We are independent and not affiliated with Polymarket, Kalshi or any game publisher.

21Core AI was founded in 2025 by Afonso Martins and is based in Madeira, Portugal. We work in English and Portuguese.

Write to contact@21coreai.com, use the contact form, or name a match for a free report.