Russ Cox has a good blog post on this data structure: https://research.swtch.com/tlog https://research.swtch.com/tlog A similar data structure has been propose

Russ Cox has a good blog post on this data structure: https://research.swtch.com/tlog https://research.swtch.com/tlog A similar data structure has been proposed as a cryptographic accumulator for the Bitcoin UTXO set: https://eprint.iacr.org/2019/611 https://eprint.iacr.org/2019/611 (Although in this case, the "log" is not append-only; elements can be deleted.)