Technical notes on blockchain systems, distributed architecture, and engineering practice.https://azzra.my.id/https://azzra.my.id/writing/onchain-vs-offchain/https://azzra.my.id/writing/onchain-vs-offchain/What building a blockchain-based civil registration system taught me about privacy, transparency, and practical system design.Thu, 05 Feb 2026 00:00:00 GMTblockchainsolidityipfsprivacysmart-contracts