# Lock-and-Mint and Burn-and-Mint Transfers Produce Different Balances

By Simon Yoon

Canonical URL: https://www.tokenpost.com/news/technology/34741
Published: 2026-10-19T11:44:31.000Z
Updated: 2026-10-19T11:44:31.000Z
Section: Technology

> Circle’s CCTP uses an attestation after a source-chain USDC burn to authorize minting on the destination network.

Lock-and-mint and burn-and-mint transfers create different kinds of balances across blockchains, so the source-token action helps determine whether users receive a backed representation or a native asset.

These mechanics describe two bridge models, not every way assets can move between networks. Other designs include atomic swaps and liquidity networks.

With lock and mint, tokens stay on the source network while matching tokens are issued on the destination network. The destination tokens depend on the originals remaining locked. If those assets are released improperly, the new tokens can be left without backing.

Burn-and-mint removes the source tokens from circulation before issuing tokens on another network. Circle’s Cross-Chain Transfer Protocol (CCTP) uses this approach for USDC. After USDC is burned on the source chain, Circle’s API observes and attests to the event; a signed attestation then authorizes minting on the destination. The resulting USDC is issued as a native asset on that network, rather than representing coins held in a bridge contract.

Transfer routes can use different validation rules. A route may check that the source event occurred, that its message was not altered and that the event met the route’s finality threshold. It may also require an issuer attestation, approval from a verifier group or proof tied to the networks involved. Some systems prevent a message from running again after successful execution, while allowing a failed attempt to be retried.

A confirmed source transaction alone does not make the destination balance ready to use; verification and the destination action are separate steps. For stablecoins and tokenized financial assets, that distinction helps explain whether a balance is a representation backed by locked tokens or an asset issued on the destination network.