Interoperability with other blockchains/ecosystems: Based on the provided sources, Proof of Signal blockchains are interoperable with Proof of Work (PoW) and Proof of Stake (PoS) blockchains. The interoperability between different blockchain consensus mechanisms like PoW, PoS, and PoS is facilitated through various technologies and protocols such as sidechains, notary schemes, blockchain routers, industrial solutions, hashed time locks, and atomic swaps.