From a Khulna Notebook to the Blockchain: Who Writes Sports Data's Ledger, and Who Reads It

Late last month, the evening session at a club ground in Khulna ended at ten past seven. Under the tin shed behind the western stand I was filling my over-by-over notebook with the session count—seven of the twenty had completed the full sprint drill, three had stopped halfway, the rest sat on the sideline with ice bags. A twenty-one-year-old analyst standing nearby held out his phone. A green-and-red graph was dancing on the screen, headed: fan token, up fourteen percent in twenty-four hours. He said, sir, this is the future. Everything will live on-chain, nobody can change it. I closed the notebook and asked: I have no objection to what gets written on-chain. The question is who reads it, and who pays to read it. He went quiet.

I know that quiet. For twelve years I have seen it—at training grounds, in dressing-room corridors, on the faces of physios standing outside the competition. In the history of sports technology the biggest question was never whether a tool works. It was who does the work, and who pays the bill.

Context

There is nothing new to say about the birth of blockchain, but the arithmetic needs to be held properly. On 31 October 2026 a pseudonymous author called Satoshi Nakamoto released a nine-page paper sketching a peer-to-peer electronic cash system. On 3 January 2026 the first block was mined, the one we call the genesis block. Seventeen years have passed since. On 30 July 2026 the Ethereum network went live, making it possible to write smart contracts—self-executing agreements—on a blockchain for the first time. On 15 September 2026 Ethereum moved from proof-of-work to proof-of-stake in an upgrade called the Merge, cutting the network's electricity use by roughly 99.99 percent. And on 10 January 2026 the US Securities and Exchange Commission approved spot Bitcoin exchange-traded funds, after which blockchain stopped being only a coder's experiment and entered Wall Street's ledger too.

Bangladesh's arithmetic is different. In December 2026 and again in September 2026, Bangladesh Bank stated plainly that cryptocurrency transactions are not legal in the country, and directed financial institutions not to get involved. Yet the question has not died inside the border, because a large share of our economy stands on money arriving from abroad. In this remittance-dependent system the word ledger is not minted in a Dhaka seminar room but in a shop in Dubai or Malaysia—where a migrant worker checks how long a transfer home will take and how much will be shaved off.

Blockchain entered sport more quietly still. In May 2026 FIFA announced that Algorand would be its official blockchain partner, under which a digital collectible line called FIFA+ Collect launched. European clubs began issuing fan tokens on the Socios platform, where supporters buy tokens and gain the right to vote on minor club decisions. Ticketing is moving the same way, with each ticket carrying a unique identity, which is said to reduce forgeries and black-market resale.

I first heard the word in 2026, at a friend's house in Khulna. He spent his nights running a computer to reconcile a network's accounts and earn money from it. I was counting sessions at a district-league training ground and logging goals from the sixteen matches of the Russia World Cup. The gap between the two ledgers startled me even then—my ledger written by one human hand, his spread across thousands of computers. Today's question was born from that surprise.

Reading that list, one might think blockchain will cure every old ailment of sport. My notebook says otherwise.

Core Analysis

I have kept a paper notebook for fourteen years. From the fields of the Khulna district league to the stands of a World Cup in Qatar, that notebook has travelled with me; I just kept writing. Today it holds eleven seasons of record, four thousand three hundred and eighty-one entries. Beside each entry: date, temperature, who was present, whose knee was packed in ice. When I first understood blockchain properly, my first reaction was envy. The weakest point of my notebook is that someone can tear out a page, and there will be no way to prove it. On a blockchain that is impossible. Once a block is added it is bound to the previous block by its hash, and no past entry can be altered without changing every copy on the network at once. In an accountant's language it is a dream—timestamped, tamper-evident, open for all to see.

And that is exactly where the first gap appears. A ledger that records cannot by itself verify what is true. A blockchain can tell you when an entry was written and that nobody changed it afterwards. It cannot tell you whether the entry was true. Whether the ball was actually offside is decided by a human outside the chain, and only then does it go on-chain. In English this is called the oracle problem—the bridge between the physical world and the chain is where the real power sits.

The sporting version of that bridge is my real worry, and it splits into five layers.

Layer one—the player's body. Almost every professional footballer or cricketer now wears a GPS vest. After a session a dashboard tells you who ran how many kilometres, who sprinted at top speed how many times, how long the heart rate sat in the red zone, how much load has accumulated. In my notebook I count overs; the club's system counts every sprint. The question is who owns that data. The player, the club, or the company that made the vest? Some contracts now list a player's biological data as club property—meaning the player hands over the data of his own body without a share of the money it earns. Blockchain could clarify ownership, if a player's data sits in his own wallet and every permission to use it is written on-chain. But technology is not just by itself; whoever holds the stronger hand in the negotiation writes the terms. However precise the session count and the load accounting, the real question is whose knee the bill finally lands on.

Layer two—contracts and transfers. Transfer paperwork, wage clauses, contract durations are still largely locked in paper and email, and when a dispute arises it takes months to find proof. If every amendment to a contract were written on-chain with a timestamp, there would be no argument about who agreed to what and when. But caution is needed here too. The agent or intermediary who guards the information today will not lose his role to a chain; he becomes the person who decides which data goes on-chain. Power does not move away, it changes clothes.

Layer three—data speed and betting. This is my strongest objection, and here blockchain works in both directions. On one side it builds a secure, verifiable pipeline for live data; who sent what and when is written on-chain, narrowing the room for data fraud. But for that very reason it also builds the most efficient supply line ever for in-play betting markets. A data scout sitting in the ground—courtsiding, in the trade's English—sends each delivery to the betting market within seconds of the ball being bowled. Blockchain makes that flow faster, cheaper and traceable. The darkest side of sports data's digitalisation is that live data is being fed straight to betting companies—and the smoother every joint of that pipeline becomes, the first to benefit are the people inside the market. The player sweating on the field has no way of knowing how many seconds it takes for his delivery to reach where the money is.

Layer four—doping tests and medical records. Here the most useful potential of blockchain hides, and the biggest danger too. If every step were written on-chain—who collected a sample, when it reached the lab, which machine tested it—doubt over results would shrink. At the same time, if medical data is permanently bound to a chain, it can become a curse for a player returning from injury; once written, who deletes it? Last season I watched a young pacer with a strapped knee and wrote in my notebook that he had bowled nine matches on the trot. The data will remember him as an injury record, but nobody will remember that at two in the morning he sat in an ice bath calling home.

Layer five—the supporter's pocket. Clubs present fan tokens as a deeper relationship, but the arithmetic shows another picture. A supporter buys a token, the token's price swings, and the risk is the supporter's. The club gets instant revenue and a new income stream; the supporter gets a vote and an asset whose value is set by a market he does not control. The fourteen percent jump on that young man's phone in Khulna was not a club's success; it was a market's pulse, which usually swings more than the result of a match. For the club it is a new revenue line, for the supporter a new expense line. In load accounting I always ask who pays the bill—here too the answer is the same: the stand pays.

The same arithmetic applies in esports. There, blockchain-based markets are forming around performance data, skins and asset ownership. But the esports beat is not like a paper notebook—the decision window there is a cooldown of a few seconds. Blockchain's slow, verifiable writing does not fit that cooldown. In-game decisions never go on-chain; only the accounts written afterwards do. On the field and on the screen, truth moves at two different speeds.

Taken together, none of this is an epic. It is a plain truth—blockchain is rearranging the ownership, the flow and the price of sports data all at once. Rearranging is not good or bad by itself. The question is whose hands the power to decide ends up in under the new arrangement.

Contrarian Angle

The biggest misunderstanding about blockchain was clear on that boy's face at my ground, and it echoes through many seminar rooms in Dhaka—the belief that on-chain means true. It does not. Put a false entry on a chain and there is no way to delete it; the error becomes permanent. If someone wrongly writes that a cricketer was not at a session, and it goes on-chain, it stays as an immutable lie. On paper, if I err, I can strike it out and write a correction; on-chain that is impossible. Immutability is not the same as truth—it merely becomes final for want of correction.

The second misunderstanding is the word decentralisation. In practice blockchain networks have become concentrated in the hands of a few large validators or miners. Where the power to verify sits with a few pools, the claim that nobody can change it is true, but the claim that everyone is equal is false. The same holds for sports bodies. If a federation itself decides the chain's outcomes, that is not decentralisation; it is old power in new clothes. Sitting in Qatar I heard how one large federation rolled out a blockchain-based solution and tightened its own control. Transparency rose, but the centre of power did not move.

The third misunderstanding is that blockchain will erase corruption. It cannot reduce corruption; it only preserves its traces. Just as truth shows up at the training ground before the scoreboard, so truth is made inside the field before the ledger—and there blockchain has no hand. In Bangladesh's case this is even clearer. Data from our age-group teams is still largely manual; selection is built on a coach's diary and a screenshot from a WhatsApp group. Put a chain there and you get timestamps, but if a coach who never watched the session writes on-chain, who catches him?

Takeaway

So looking ahead I am not watching token prices. I am watching three signals. First, whether players' associations—professional cricketers' and footballers' unions especially—begin adding clauses on biological-data ownership and revenue sharing to their contracts. Second, whether boards and federations open their ticketing ledgers to the public, so that who paid how much for a ticket can be verified. Third, whether bodies at FIFA or ICC level move towards verifiable digital credentials, where a piece of data's source and time become proof in themselves.

My notebook travelled from Khulna to the World Cup; I just kept writing. Blockchain may be a better ledger than mine, no doubt. But however good the ledger, one question never dies—on an evening at a ground, before the truth is recorded, who saw it, and after it is recorded, who made money from it? Until that question is answered, the new technology will simply run the old arithmetic again. I trust the notebook more than the noise—now the question is whether the chain can be a worthy answer to that notebook.