Solana is building the architecture of their blockchain based on Proof of History (PoH); a proof for verifying order and passage of time between events.

Features:

Proof of History, the basis for the Solana network, is a sequence of computation that can provide a way to cryptographically verify passage of time between two events. It uses a cryptographically secure function written so that output cannot be predicted from the input, and must be completely executed to generate the output.