Tari uses merge-mining with Monero, relying on its proof-of-work model to validate half its blocks and enhance security and decentralisation

Quotes that support claims

The Tari mainnet genesis block has been mined, with the live network offering decentralized mining access from day one

The Tari network is often described as a merge-mined sidechain of Monero, tapping into the network’s proof-of-work security model to mine half of its blocks on Tari and half on Monero