The new NFT Passports, which were introduced live at ETH Denver, will also enable cross-chain operations.

Harmony, whose mainnet operates on the Ethereum network and claims to have two-second transaction completion and fees 1,000 times cheaper than Ethereum, revealed the emergence of the Bored Ape Yacht Club Passport on Friday. Users can use the Passport to import evidence of their apes into DeFi Kingdoms, a play-to-earn game based on the Harmony blockchain that has around 120,000 monthly active users. When Ape holders connect their MetaMask wallet to DeFi Kingdoms during its early stages, they will be able to verify and show their assets in the game across various blockchains.
Since cross-chain technology is still in its development, funds could be at threat while connecting across chains, as shown by the largest decentralized financial breach this year. According to its developers, Harmony's Passport does not shift assets rather it validates asset ownership across various blockchains, ensuring their legitimacy across. Horizon, its cross-chain bridge, now allows for connectivity between Harmony, Ethereum, BNB Chain, and three additional blockchains.
According to Leo Chen, a Harmony team member:
“We wanted to give all NFT holders more utility and options to display their NFTs and participate in the Metaverse. Bored Ape Yacht Club holders are the first choices. The cross-chain identity creates a secure and easy way to do so without putting their assets at risk.”
In an identical move, Twitter launched its nonfungible token campaign last month, enabling its premium users to display their NFTs as profile images. Even though the feature's technical features are still in trial, with only Ethereum-based NFTs qualified and no support for cross-chain features.