KYT & Blockchain Transaction Monitoring Requirements
Know Your Transaction Standards for Digital Asset Firms
Know Your Transaction (KYT) refers to the continuous monitoring of cryptocurrency transactions to detect suspicious or illicit activity. This whitepaper examines how centralized exchanges deploy real-time blockchain analytics tools - including Chainalysis KYT, TRM Labs, and Elliptic - to screen transactions against databases of sanctioned addresses, darknet markets, ransomware wallets, and mixing services. It covers the full KYT operating model: automated rule-based alerts, case management, SAR filing obligations, Currency Transaction Report requirements, and FATF Travel Rule compliance via platforms such as Notabene, TRISA, and Sygna. The whitepaper also addresses the structural absence of KYT in DeFi protocols, the role of blockchain analytics in external monitoring of DeFi flows, and the growing role of fraud-risk platforms such as Sardine in supplementing on-chain surveillance with off-chain behavioral signals.
Illicit crypto volume in 2023 measured in billion according to the Chainalysis annual report.
Suspicious Activity Report filing deadline in the United States, measured in days from the date suspicious activity is detected.
Currency Transaction Report cash threshold in the United States, set at ten thousand dollars and triggering mandatory reporting.
Key Takeaways
Five key takeaways on how crypto transaction monitoring and reporting works in practice, from real time blockchain analytics and exchange surveillance systems to regulatory reporting requirements and the limits of compliance in DeFi.
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Blockchain Screening
Centralized exchanges integrate real-time blockchain analytics platforms - Chainalysis KYT, TRM Labs, and Elliptic - to automatically screen inbound and outbound transactions for exposure to sanctioned addresses, darknet markets, ransomware clusters, and mixing services.
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On Chain Monitoring
Exchanges deploy rule-based monitoring for on-chain red flags including rapid velocity changes, structuring attempts (sub-threshold transfers), dormant wallet reactivations, and multiple users sending to the same unknown address.
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SAR Reporting Timelines
SARs must be filed in the U.S. within 30 days of detecting facts that form the basis of suspicion; high-volume exchanges file thousands of SARs annually to FinCEN, comparable to mid-size banks.
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Travel Rule Compliance
The FATF Travel Rule requires VASPs to transmit originator and beneficiary information for qualifying crypto transfers; compliance is facilitated via dedicated platforms including Notabene, TRISA, OpenVASP, and Sygna Bridge, with the EU now requiring Travel Rule data on all CASP-to-CASP transfers regardless of amount.
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DeFi Oversight Gap
DeFi protocols have no built-in transaction monitoring or SAR filing capability; compliance in DeFi is handled externally by analytics firms and law enforcement monitoring the public blockchain, with practical enforcement occurring at centralized on/off-ramps.
Reimagining Compliance
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