Bitcoin
Bitcoin: a network, a currency, and common rules
Bitcoin refers to a payment network; the bitcoin, denoted as BTC, is its asset. Its operation relies on signatures, verifying nodes, and a mechanism called proof of work.
Ryan MitchellEditorial pen name
Bitcoin’s different functions
Bitcoin is a network that allows the transfer of a digital asset without a central bank holding its register. The bitcoin, abbreviated as BTC, is the unit that circulates on this network. Distinguishing the infrastructure from its asset avoids confusion: the technical operation of the protocol and the price offered on a platform are two different topics.
02How it works+
To send bitcoins, a wallet prepares a transaction and signs it with the necessary keys. This signature proves the authorization to spend certain funds without disclosing the secret used. The transaction is broadcast to participants who verify its compliance, particularly the absence of a previously recorded expenditure for the same funds.
Keys and services
03Key points to remember+
Miners gather transactions into blocks and participate in a computer competition called proof of work. The nodes then verify that the blocks respect the network's rules. Mining therefore does not replace verification: a block proposing an unauthorized creation of money does not become valid just because it required a lot of calculation.
The current rules limit the total emission to twenty-one million bitcoins. New emission decreases in stages, while fees also contribute to remunerating miners. It is not necessary to transfer a whole bitcoin: the asset is divisible into smaller units, the satoshis. This divisibility concerns quantities, without guaranteeing a future value.
A transaction integrated into the history gains assurance when other blocks follow. This does not equate to a general possibility of cancellation: the network does not have a customer service that can take back a confirmed payment. Fees and delays vary according to demand and network conditions. The public history also does not make all individuals anonymous. Finally, Bitcoin does not reward the mere holding of BTC. A service promising a return adds its own mechanism and risks, distinct from the Bitcoin protocol itself.
From payment to confirmation
A bitcoin payment brings together several objects that everyday language often treats as one. The network transmits and checks operations; the unit bitcoin expresses a quantity; the wallet prepares a transaction and uses keys to authorise it. The destination address identifies where value should be sent. None of these functions is equivalent to the market price, which results from trading in venues distinct from the protocol itself. A price movement does not describe a change to the rules used to verify a payment.
Imagine somebody viewing an address balance in an explorer. They can observe transactions without possessing the information required to spend the funds. That visibility illustrates the difference between reading public information and authorising an operation. As a transaction receives confirmations, additional blocks are added to the history containing it. A number displayed in an application does not, by itself, explain every stage in this process. The status and context of the transaction provide further information.
Distinguish the services involved
A platform may display a bitcoin balance while retaining the private keys itself. Its customer then has access to a service under conditions defined by the provider. Personal custody involves a different arrangement for secrets and backups. Both situations concern the same asset, but their dependencies are different. The operation of the network, the conditions imposed by an intermediary and movements in market prices therefore remain separate subjects. Keeping them distinct makes it easier to understand what a particular announcement or product actually changes.