Bitok Arena uses your Bitcoin address as your competitive identity — and Sparrow Wallet is built specifically for users who want complete visibility into and control over their Bitcoin addresses and the UTXOs behind them. For Sparrow users, entering the competition is a standard send from a wallet designed to give maximum information and control at every step of the transaction process.
Most Bitcoin wallets abstract away the details of coin selection and fee estimation. Sparrow makes them explicit. That philosophy of transparency applies equally to the competition: every on-chain detail is visible to anyone, and Sparrow users are already comfortable reading those details.
Understanding what Sparrow provides — and why its coin control features are relevant for privacy-conscious competition participants — shows how the wallet and the leaderboard work together at the level of individual transactions.
What Sparrow Wallet Does Differently
Sparrow Wallet is a desktop Bitcoin wallet focused on privacy, coin control, and full transparency about what is happening at the transaction level. It shows UTXOs — unspent transaction outputs — as individual items that you can select, freeze, or label, giving you precise control over which on-chain coins fund any specific transaction. It integrates with hardware wallets including Coldcard, Trezor, Ledger, and others, acting as the interface while the private key stays on the device. It also supports connecting to your own full Bitcoin node for verification without trusting any third-party server.
Sparrow's coin selection feature is particularly relevant for privacy: by choosing which UTXOs fund a transaction, you control which parts of your transaction history become visible in a single on-chain event. Sending to a competition round from a specific set of UTXOs does not expose the rest of your Bitcoin activity — only the coins you choose to spend become part of that transaction graph.
For competition entries, Sparrow provides clear transaction construction: you select the UTXOs, enter the master wallet address, set the fee, and review the complete transaction before broadcasting. If you use Sparrow with a hardware wallet, the signing step happens on the device. If you use it with a software wallet stored on your computer, the signing happens locally. Either way, the private key never leaves your environment.
Sending to the Competition from Sparrow
Open Sparrow and navigate to the Send tab in your Bitcoin account. In the destination field, paste the master wallet address shown on the platform. Set the amount for this round entry. In the coin selection area, choose which UTXOs to use — Sparrow shows each coin with its origin transaction and amount, letting you decide exactly which on-chain history becomes linked to this send.
Select an appropriate fee rate for the time remaining in the round. Sparrow displays the fee in satoshis per virtual byte alongside the estimated confirmation time at current mempool conditions. A fee that ensures confirmation within the round window is all that matters for competition timing. After reviewing the transaction details in Sparrow, confirm and broadcast. The transaction appears in the mempool immediately and on the leaderboard once it confirms.
The leaderboard is a public record. Sparrow gives you control over exactly which part of your Bitcoin history contributes to that record. Both the transparency and the control operate on the same blockchain — one reveals, the other chooses what to reveal.
Prizes paid to a Sparrow-managed address arrive as standard on-chain receives visible in the wallet immediately. They appear as UTXOs in your coin list, available for future sends — including future competition entries or hardware wallet-assisted cold storage transactions.