Blockchain and Cricket Reviews: Can an Umpire's Decision Be Written on a Ledger?

On July 14, 2026, at Lord's. In the final over of the World Cup final, the ball deflects off Ben Stokes's bat and rolls toward the boundary — six runs, four of them overthrows. The match turns on that single moment, and the argument does not stop after the final ball: was the application of Law 19.8 correct? New Zealand supporters still believe those four runs cost them the trophy. My question is different — does that decision have any auditable record at all? A ledger showing who reviewed it, on which frame, under which law, and with what level of confidence?

In Kuala Lumpur, I began logging VAR incidents; the pattern was already there. In 2026, while I was an International Communication student in Kuala Lumpur, watching the FIFA Confederations Cup taught me that controversy is rarely about the decision — it is about the invisibility of the process. Twelve matches, twelve reviews; I built a spreadsheet of minutes, laws and outcomes, and then wrote The Referee's Eye. In 2026 I expanded that list across all 64 matches of the Russia World Cup and published the VAR Protocol Audit — 20 overturns, each with trigger, review type, final call and law citation. What became clear was this: fans can accept a decision, but they cannot accept an invisible process. That exact gap is what blockchain now claims to fill in cricket.

The background matters. Reviews are not new to cricket. In July 2026, during the India–Sri Lanka Test series, the Decision Review System (DRS) was used for the first time, with limited scope. Gradually the system settled into three layers: the on-field umpire's instant call, the player's review, and finally the third umpire's screen-based check. The third umpire has ball-tracking (Hawk-Eye), UltraEdge and Snicko for edge detection, and the stump microphone audio. Every review is effectively a data chain — camera frames, sensor calculations, audio slices, and a human interpretation.

The problem sits here. The viewer sees only the outcome — out, not out, Umpire's Call. The inner layers of the data remain practically invisible. Where exactly the Umpire's Call margin landed, on which frame the ball pitched, what was precisely heard on the stump mic — these answers are usually not carefully preserved by anyone. After a disputed decision, the cricket fan is left with a screenshot and infinite doubt.

My audit method applies here. From the 2026 Kuala Lumpur incident log to the Russia 2026 audit, I have built a decision tree every time: what was the trigger, what type of review, what was the final call, and which law citation explains it. What keeps surfacing is that without auditability of the process, even a correct decision fails to become credible. And that credibility crisis is now pushing cricket toward new technology.

What is blockchain, really? In simple terms, it is a distributed ledger — the same information written across many computers at once, and once written, it is nearly impossible to alter, because each block carries the cryptographic hash of the previous one. Any change breaks the entire chain. Blockchain has entered sport mainly through two routes: digital collectibles/NFTs, and fan tokens. Cricket has felt the wave too: in 2026, the ICC partnered with FanCraze to launch cricket digital collectibles, preserving famous moments as tokens.

The fan-token model came from football. On platforms like Socios, clubs sell tokens to fans, and holders can vote on limited decisions — jersey design, friendly opponents, sometimes goal soundtracks. Despite world stars like Virat Kohli, this market in cricket remains smaller than football's, because cricket fandom is nation-based rather than club-based. That is the first crack.

The second layer is more important and less discussed — data integrity. Cricket's deepest wound lies in spot-fixing and betting-related corruption. The ICC's Anti-Corruption Unit spends years chasing networks of players, agents and bookmakers. Blockchain's promise is a tamper-proof record — when a player shared what information, who received which pre-match warning, all on an immutable ledger. In anti-corruption, blockchain's value is not in making decisions but in preserving evidence.

Now to the real question — can the review system run on blockchain? In theory, yes. The moment a decision is announced, its hash (review ID, frame number, raw ball-tracking data, audio timestamp, umpire's explanation) could be written to a ledger. If someone later claims the data was altered, any independent analyst could match the hash and verify. What was a blog post and a spreadsheet in my 2026 audit could become a universal, verifiable archive.

Imagine it — every Umpire's Call, every third-umpire overturn, every match-referee sanction, all timestamped in one place. A doubting fan could verify; a journalist could show proof; researchers could even extract season-long patterns — which umpire errs more on which type of call, which venue's ball-tracking is more misleading. This kind of transparency could lift cricket's review system to a new level of credibility.

Smart contracts could push it further. Suppose the conditions of a review are programmed: ball pitching in line, impact in line, and the wicket call outside Umpire's Call. If all three conditions are automatically true, the system itself could declare out — with no human intervention. The theory is elegant. But here my referee brain stops it.

The referee's eye is a frame-by-frame threshold test, not a whistle. And the biggest enemy of that threshold test is subjectivity — which blockchain cannot touch. Umpire's Call is not a data problem; it is a policy decision. The ICC deliberately keeps a margin so that clear errors and fine approximations stay separated. Blockchain can immortalise that margin, but how large the margin should be is a political and sporting-policy decision, not a technical one.

The second limitation: garbage in, garbage out. Blockchain only preserves what is written. If ball-tracking is calibrated on the wrong frame, or stump-mic audio syncs late, that bad data sits on the ledger forever, unchangeable. Blockchain does not verify truth; it only guarantees immutability. When a wrong decision becomes immortal, correcting it becomes even harder — that is the paradox of transparency.

The third problem: governance structure. Blockchain's core philosophy is decentralisation — power not held by a central authority. But cricket is run in a highly centralised way, by the ICC and member boards. Any official blockchain would in practice be a private, permissioned ledger — where who can write and who can read is controlled by the board itself. Then where did the decentralisation go? A blockchain controlled by a central authority is little more than an ordinary database.

The fourth barrier is privacy. Placing a player's biometrics, injury data or personal information on a public ledger is risky. A fully private ledger, meanwhile, delivers nothing in the name of transparency. Cricket has not yet solved this balance.

Despite these limits, blockchain hype is far bigger than the actual technology. In marketing, blockchain is now a magic word — as Big Data once was, and heatmaps before that. My old objection to heatmaps was this: heatmaps hide a player's real role within the system, and in the same way blockchain's glossy packaging hides the real question — who produces the data, and who interprets it. Many cricket blockchain projects are actually fan tokens or NFTs unrelated to the review system, with zero connection to on-field umpiring.

So where is the real progress? I believe blockchain's value lies not in decentralisation but in auditability. A simple, centralised yet public review log — recording every decision, its law citation, frames and confidence level — would do far more good than a fan token. That is the lesson from my 2026 Kuala Lumpur incident log: when evidence is public, suspicion falls, and institutions come under accountability.

In my view there are three practical paths for cricket. One, publish the raw review data log — at least to an independent panel. Two, maintain a public decision record for every overturn, logging trigger, review type and final call. Three, use blockchain only where immutability is genuinely needed — such as preserving anti-corruption evidence — and not merely for fashion.

The issue is even more relevant in the Bangladeshi context. Our cricket culture debates umpiring with intense emotion — on post-match TV panels, on Facebook, in tea stalls. But the debate almost always lands on the decision, not the process. If review data were public, the argument would centre on a specific frame or legal interpretation, not personal attacks. Across Shakib Al Hasan's career there are many moments where the fairness of a call was questioned purely for lack of transparency.

Stars like Babar Azam face the same problem — in international cricket, differences in venue and umpire temperament affect decisions, and the ordinary fan holds no neutral accounting of that effect. Blockchain cannot fix this inequality, but it can at least create a verifiable record — one in which bias, if present, can be proven.

So what should cricket authorities do? I believe that before pouring money into blockchain projects, they must answer one fundamental question: are we prepared to make every step of the decision process public? If the answer is yes, even an ordinary database will do. If the answer is no, no blockchain will create trust. Technology is not a substitute for trust; it is only an aid to it.

This is why I see blockchain as a tool, not a solution. In the Russia 2026 audit I learned that a decision's worth is set by the transparency of its process. Blockchain can give that transparency a permanent form, but transparency must be demanded from human will — not from code. Technology will write the ledger; but the decision to open the ledger must be taken by cricket's rulers.

A disputed out, a mishit overthrow, an Umpire's Call — the judging of right and wrong will continue through the ages. But one question must now be asked of the cricket world: if the evidence exists, why should it not be in front of everyone? And if the evidence does not exist, why do we seek comfort by blaming technology? Whether an umpire's decision can be written on a ledger is not a question of technology — it is a question of will.