Bitcoin.org, an undated page read Oct. 18, 2026, describes a bitcoin transaction as a transfer of value between two wallets, recorded in the blockchain, a public ledger of transactions. The sender's wallet signs the transaction. It is then broadcast to the network and packed into a block through mining. The steps and figures here are Bitcoin's, and the sources do not cover how other cryptocurrencies confirm transactions. The risk of a reversed transaction falls with each confirmation.
Key facts, per bitcoin.org
- Units: One bitcoin equals 100,000,000 satoshis, the units it is divided into.
- First confirmation: Usually about 10 to 60 minutes after broadcast.
Step 1: the wallet signs the payment
Bitcoin.org says a wallet keeps a private key, a secret piece of data used to sign transactions. The signature gives mathematical proof that the transaction came from the wallet's owner. It also stops anyone from altering the transaction after it has been issued.
A transaction is a transfer of value between Bitcoin wallets that gets recorded in the blockchain.
Step 2: broadcast and mining
Bitcoin.org says the signed transaction is broadcast to the network. It usually gets its first confirmation within about 10 to 60 minutes, through mining. To be confirmed, the transaction must be packed into a block. That block must follow very strict cryptographic rules, and the network verifies them. Mining works like a competitive lottery, which makes it hard for any one participant to keep adding blocks one after another.
The block interval
Bitcoin.org says a new block is appended roughly every 10 minutes on average, through mining. Because that figure is an average, the timing of any one payment can vary.
How many confirmations to wait for
Bitcoin.org says each confirmation exponentially decreases the risk of a reversed transaction. Exponentially means each added confirmation cuts the risk that remains, rather than subtracting a fixed amount. A single confirmation can be considered secure for low value transactions. For higher value transactions, it makes sense to wait for 6 confirmations or more. Answer two questions about a payment to see which of these points applies.
Which confirmation guidance applies?
Check whether the payment is in a block and whether its value is low.
Has the payment been packed into a block yet?
- No → Not yet confirmed
- Yes → next question
Is the payment low in value?
Source: Vocabulary - Bitcoin (bitcoin.org), accessed Oct 18, 2026
The first confirmation usually comes within about 10 to 60 minutes of broadcast.
Source: How does Bitcoin work? - Bitcoin (bitcoin.org), accessed Oct 18, 2026For low value transactions, bitcoin.org says a single confirmation can be considered secure.
Source: Vocabulary - Bitcoin (bitcoin.org), accessed Oct 18, 2026For higher value transactions, bitcoin.org says it makes sense to wait for 6 confirmations or more.
Source: Vocabulary - Bitcoin (bitcoin.org), accessed Oct 18, 2026These are bitcoin.org's general statements for Bitcoin, undated in the text, and they do not cover current fees or confirmation times.
Who keeps the record
The Texas State Securities Board says each computer on the Bitcoin network keeps its own copy of the entire blockchain. It explains this with a hypothetical sale of a mountain bike, not a real transaction.
Balances are not account totals
Bitcoin.org says Bitcoin balances are not stored as account totals. Each wallet instead holds unspent transaction outputs, or UTXOs, which are amounts it can spend in future transactions. The blockchain records confirmed transactions. That lets a wallet calculate its spendable balance and lets the network check that the sender has the right to spend those coins. Kaspersky calls the blockchain a distributed public ledger.
What the fee buys
Bitcoin.org says a transaction fee is a small amount of bitcoin that the sender pays to encourage miners to include the transaction in a block. Fees are not fixed. Users choose how much to pay. Transactions with higher fees tend to confirm faster, especially when the network is busy.
If the private key is lost
Kaspersky says that if a self-custody wallet's private key or recovery seed phrase is permanently lost, generally no central organization can reset it. A self-custody wallet is one the holder controls directly, not one held by an exchange or another custodial service.
Analysis: matching the wait to the value at stake
Matching the wait to the value at stake is the practical step. A low value payment and a higher value payment can sit at the same point in the chain and still call for different waits. The private key needs the same care. Kaspersky says that a permanently lost self-custody key generally cannot be reset by a central organization.
A separate explainer covers how mining pool payouts reach a wallet. The next step is bitcoin.org's full explanation of how Bitcoin works. None of the bitcoin.org, Texas State Securities Board or Kaspersky pages states a publication date in its text. The first-confirmation timing of about 10 to 60 minutes has no cited source. Current fees and confirmation times are not covered by these sources.
Sources: How does Bitcoin work? - Bitcoin (bitcoin.org), accessed Oct 18, 2026 · Vocabulary - Bitcoin (bitcoin.org), accessed Oct 18, 2026 · Cryptocurrencies: How They Work | Texas State Securities Board (ssb.texas.gov), accessed Oct 18, 2026 · What is Cryptocurrency and How Does it Work? (kaspersky.com), accessed Oct 18, 2026
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