On-Chain Data

On-chain data is everything permanently written to a blockchain and readable by anyone: transactions, addresses and balances, smart contract state, block timestamps and event logs. It is the raw material for block explorers, wallets, tax tools and blockchain analytics firms, which combine it with off-chain information to attribute activity to real people and businesses. Because on-chain data is public and cannot be deleted, privacy is a design problem rather than a default — reusing a single address links your transactions together, and one connection to a verified exchange account can expose an entire history. Analysts also read on-chain data as market context, tracking active addresses, exchange flows or total value locked, though such metrics are noisy and easy to misinterpret.