Compressed NFT

Solana's state-compression approach to NFTs: instead of storing each NFT's metadata on-chain, the entire collection's data lives in a Merkle tree off-chain with only the root hash on-chain. Owners prove ownership via Merkle proofs. Minting 1 million cNFTs costs roughly the same as 1 regular NFT on Ethereum. Used for loyalty programs, game items, ticketing — high-volume use cases that wouldn't be economically viable with traditional NFT storage.