How will Kaspa verify old transactions without storing all of its history?

Zero-knowledge proof technology, called ZK opcodes and currently in development, will let Kaspa prove the validity of any transaction all the way back to its first-ever block — without having to store or replay every block in between. In most blockchains, verifying that an old transaction was valid requires keeping a copy of the full chain history and re-running it. ZK proofs replace that process with a compact mathematical proof: instead of "trust us, we archived it," the network says "here is a cryptographic proof it happened." For a beginner, this means Kaspa is working toward a system where you can trust the ledger's history is correct not because someone stored it, but because math guarantees it.