The ROAST technology being worked on at Peercoin not only makes it possible to form massive multisignature groups and distributed oracles, it also enables use on foreign blockchains like Ethereum.

This article describes how a cross-chain bridge between Peercoin and Ethereum can be created using ROAST:

https://peerchemist.medium.com/roast-oracles-for-ethereum-smart-contracts-4900fdf2d075