OFAC Blockchain Analytics Glossary Part 1
Core terms for tracing on-chain activity and attributing wallet addresses to support OFAC sanctions screening.
TL;DR
TL;DR: Blockchain analytics is the practice of tracing transactions and clustering wallet addresses on a public ledger. It is how OFAC identifies and lists the crypto wallets that sanctions programs block.
What blockchain analytics is
Blockchain analytics examines the public ledger to trace the flow of funds, link related addresses, and attribute clusters to real-world entities. Because blockchains are public, every transaction leaves a record that analysts can follow. This work underpins sanctions enforcement: when OFAC lists a crypto wallet, that listing typically follows analytics that connected the address to a blocked person or entity. The resulting wallet identifiers feed directly into screening systems.
Why it matters for agent payments
Screening an agent's counterparty depends on accurate, current wallet listings, and those listings come from blockchain analytics. A payment engine can only block a bad address if it knows the address is bad. sanctionsai.dev maintains 947 OFAC-listed crypto wallets in its live data, synced hourly, so an agent paying on Base/USDC can check the destination before it moves funds. The result comes back clean or flagged in one HTTP call under 100 ms.
Terms covered in Part 1
- Address clustering: grouping wallets controlled by one actor.
- On-chain trace: following a transaction across the ledger.
- Attribution: linking an address to a real-world entity.