Every day there are millions of blockchain transactions.Airstack makes sense of them.Abstract. Airstack is a decentralized data network that makes blockchain activity easily discoverable, browsable, and consumable. Before Airstack, blockchain data was trapped in silos: A person might transact with a bunch of dapps, or interact with different protocols, or earn various currencies, or trade different tokens, or participate in various DAOs, or be a member of several NFT communities, and each of those transactions happen in isolation. Airstack brings those transactions together in virtual stacks of data. For example, with Airstack you can easily pinpoint that 5040 people all used a specific dapp today, that 807 of them used that dapp plus a specific DeFi protocol, 257 of them are members of investment DAOs, and that 53 of them are also attending the upcoming ETH.cc conference. This data is incredibly valuable to developers, traders, investors, marketers, and for various types of business development. The Airstack Data Privacy Protocol (ADPP) provides for access to this data while empowering consumers to securely lock, control and monetize it. ADPP also provides a method for ensuring that no 3rd party, including Airstack, can de-anonymize user data without their permission.