0520 - Quasi-immutable whitelist/blacklist databases for verifier queries and purging
Summary: A whitelist or blacklist can track record status updates and be queried by a verifier. The list can be managed quasi-immutably by storing updates where older entries become redundant and can be purged or superseded, and by searching only until the most recent relevant entry is found. This supports efficient status checking without requiring full immutability of all entries.
Technology: Data Infrastructure, Databases, Quasi-Immutable Lists
Industry: data_infrastructure
Applications: status registries
Topic: Access Control & ACLs
Sequence ID: 0520