Proof-of-burn (Proof-of-Burn, PoB) is a consensus mechanism in which a participant demonstrates their interest in the network by irreversibly destroying a portion of coins. To "burn" funds, they are sent to a special address that deliberately has no private key: from there the coins can no longer be spent or returned. This irreversible sacrifice serves as the "proof," replacing the costly computations characteristic of classic proof of work.

The idea is that, by giving up real value, a user makes a long-term bet on the project and gains the right to participate in creating new blocks. The algorithm is often used for the initial issuance: coins of one network are burned to obtain assets of another. The chance of being chosen to form a block is, as a rule, proportional to the amount burned, so the process resembles a lottery among everyone who has sacrificed their funds.

Why Proof-of-Burn is needed

• reduced energy consumption compared with hardware-based mining;
• a fair initial distribution and a link between different blockchains;
• an economic incentive for holders to keep the network operational.

The approach has its controversial sides too: destroying real value seems wasteful, and the advantage goes to participants with large investments. Nevertheless, PoB remains one of the original ways to reach agreement in a decentralized system without large-scale energy expenditure.