Proof of Proof in Blockchain

Concept

Proof of Proof in Blockchain refers to a meta-proof system where the validity of one cryptographic proof is itself verified and attested to by another, typically more robust or foundational, proof mechanism. This concept often arises in layered blockchain architectures, where a layer-2 solution generates a proof of its computations, and this proof is then validated on the layer-1 blockchain. It establishes a chain of cryptographic assurances, ensuring the integrity of complex off-chain operations.