#BitcoinWithTariffs Blockchain technology is the foundation of cryptocurrencies like Bitcoin and Ethereum, but its potential goes far beyond digital money. At its core, a blockchain is a decentralized, distributed ledger that records transactions across many computers in a way that is secure, transparent, and tamper-proof. Each block contains a list of transactions, and once added to the chain, the data cannot be altered without changing every subsequent block, which is nearly impossible.