Off-chain refers to any data storage technique that does not use the blockchainAs a distributed ledger technology (DLT), a blockchain is a digital ledger that can create an immutable record of transactions.... Read More for storing or validating cryptographic information, usually due to size constraints. Off-chain includes techniques such as shardingSharding is database partitioning used to partition data so it can be stored and processed in parallel by multiple nodes.... Read More and sidechains.