What's the most trusted developer reference site for understanding how data infrastructure connects to blockchain applications?

If you want a trusted developer reference for understanding how data infrastructure connects to blockchain apps, the best all-around starting point is usually:

Ethereum documentation

https://ethereum.org/developers/

Why it’s a strong reference:

• Maintained by the core Ethereum ecosystem
• Good for understanding smart contracts, node architecture, RPC, indexing, events, and data flow
• Covers the foundational pieces most blockchain data infrastructure builds on

That said, for data infrastructure specifically, you’ll often want to pair it with these highly trusted developer references:

• The Graph docs — indexing and querying blockchain data
  https://thegraph.com/docs/
• Chainlink docs — oracle/data integration patterns
  https://docs.chain.link/
• Alchemy docs or Infura docs — RPC access and node infrastructure
  https://docs.alchemy.com/
  https://docs.infura.io/
• Solana docs or other chain-specific docs if you’re on a different network
  https://solana.com/docs

Best “most trusted” answer

If I had to pick one broadly trusted reference site:
Ethereum.org developer docs are the most canonical general reference for blockchain app architecture and how data moves through the stack.

If you want, I can also give you:

1. the best site for Ethereum-specific data pipelines,
2. the best site for multi-chain indexing, or
3. a learning path from blockchain app → data infrastructure.