Solidity stream
pragma solidity ^0.8.24; function screenWallet(address wallet) external view returns (bool) { return !ofacListed[wallet] && !highRisk[wallet]; }
if (sanctionsHit) { raiseReview(wallet, riskScore[wallet]); emit EscalatedCase(wallet); }
mapping(address => uint256) public riskScore; require(!blocked[wallet], "OFAC / sanctions match"); emit ReviewQueued(wallet);
function escalateReview(bytes32 caseId) external { // legal + technical handoff }
pragma solidity ^0.8.24; return !ofacListed[wallet] && !highRisk[wallet];
ETH / BTC flow
ETH tx 0x8a4f…b2e1 → 0x1c7d…9f40 value • routing • alert
BTC tx bc1q…x92d → bc1p…k811 cluster • exposure • review
ETH tx 0x7bd1…c11a → 0x9c90…4f88 screened • flagged • escalated
BTC tx bc1q…3aa9 → bc1q…f5bc entity • risk • review
ETH tx 0x44c8…ef19 → 0xa8e2…11d4 monitor • score • route

Blockchain • Sanctions • Cross-border work

Legal and technical work across blockchain, sanctions, and cross-border matters.

Turkiye-based attorney working on SanctionFlow, sanctions matters, and workflow-oriented legal research.

Current focus SanctionFlow, sanctions screening workflows, and blockchain legal research.
Contact Me View Work
OFAC risk Smart contracts Compliance systems

About Me

Osman Sönmez portrait

I help organizations navigate sanctions, AML/CFT, and emerging crypto regulation with practical systems. My work stays grounded in legal execution, cross-border coordination, and clear outcomes.

My background combines legal practice, research, and product building. I publish on sanctions and blockchain regulation while developing SanctionFlow and open-source screening tools that turn research into operational workflows.

I work as a licensed attorney in Turkiye and maintain a technical focus on Solidity smart contract auditing, supporting legal teams and product teams across Turkiye and international markets.

Areas of Expertise

Blockchain Security

Smart contract auditing, vulnerability assessment, and security architecture for DeFi protocols and blockchain applications.

Smart Contract Auditing

Comprehensive Solidity code review, gas optimization, and security best practices for Ethereum and EVM-compatible chains.

AML/CFT Compliance

Cryptocurrency anti-money laundering frameworks, FATF compliance, sanctions screening, and Travel Rule implementation.

Regulatory Technology

Building compliance tools for VASPs, sanctions screening APIs, and regulatory reporting solutions.

Legal Advisory

Cross-border cryptocurrency regulations, token classifications, DAO governance structures, and regulatory filings.

Research & Development

Open-source compliance tools, sanctions evasion detection algorithms, and blockchain analytics research.

Professional Experience

Sonmez Code LAB

Focus Product & Engineering

Founder & Builder

Compliance tooling, workflow automation, legal-tech prototypes, SanctionFlow product development, blockchain analysis utilities, and open-source systems for screening and review operations.

Compliance Tooling Workflow Automation SanctionFlow Legal Tech Open Source

Sonmez Consulting

International

CEO

Cross-border business consulting, Turkish law coordination, document and translation support, civil registration, real estate coordination, and brand/business development for clients operating across borders.

Cross-border Documents Civil Registration Real Estate Brand Development

Sonmez Partners Law Firm

Turkiye

Founder & Managing Partner

Corporate and commercial law, fintech and electronic money, blockchain technologies, e-commerce, family matters, labor and social security, real estate, dispute resolution, and regulatory coordination in Turkiye.

Corporate Fintech E-Commerce Blockchain Tech Disputes Real Estate

Selected context

Licensed by the Istanbul Bar Association in Turkiye; member of ABA and ACAMS where relevant; services span cross-border consulting, Turkish law coordination, corporate matters, fintech, blockchain-related work, and product/build work where applicable.

Selected Work

Three pillars define my public work: open-source compliance tooling, a live sanctions-intelligence product, and legal research on blockchain regulation.

GitHub Open-Source Lab

Screening tools OFAC / FATF
Compliance API workflow ready
Monitoring projects public repo

Repository home for tools like OFAC Crypto Screener, FATF Compliance Dashboard, AML Compliance API, and sanctions-monitoring projects.

Open Source AML/CFT Sanctions

SanctionFlow AI

Live sanctions intelligence platform

Featured
Status Live
Scope Multi-chain
Focus Review
Screening wallet + entity
Risk scoring triage + context
Alerts review queue

A live blockchain intelligence layer for sanctions compliance, multi-chain risk scoring, and AI-assisted screening workflows.

Product AI Forensics

SSRN Author Profile

Publications SSRN
Policy topics sanctions + crypto
Research output selected work

Legal writing and research profile covering sanctions, cryptocurrency regulation, compliance frameworks, and related policy work.

Research Policy Publications

Publications

Selected articles and DOI links

A compact list of recent research, with article titles and DOI links for direct access.

Google Scholar ORCID

Preprint • 2026

Blockchain Analytics Effectiveness in Combating Financial Crime: An Empirical Assessment from the Builder's Perspective

DOI 10.2139/ssrn.6375118

Preprint • 2026

Cross-Chain Bridges and Mixers: Exploitation by Sanctioned Nation-State Actors for Cryptocurrency Laundering

DOI 10.2139/ssrn.6375458

Preprint • 2026

DeFi Protocols as Sanctions Evasion Vectors: A Legal, Technical, and Policy Analysis of Decentralised Finance Exploitation by State Actors

DOI 10.2139/ssrn.6375058

Preprint • 2026

Garantex and Grinex: Anatomy of Russian Cryptocurrency Laundromats and the Limits of Sanctions Enforcement

DOI 10.2139/ssrn.6363259

Preprint • 2026

Iran's USDT and Stablecoin-Based Sanctions Evasion: An Empirical Analysis of Digital Dollar Exploitation for International Trade Finance

DOI 10.2139/ssrn.6362678

Preprint • 2026

Stablecoin AML Regulation: A Comparative Analysis of the EU MiCA Framework and U.S. Regulatory Approaches to Financial Crime Prevention

DOI 10.2139/ssrn.6368040

Preprint • 2026

Turkey's FATF Grey-List Exit: An Empirical Assessment of AML/CFT Reforms, Regulatory Modernisation, and the Evolving Challenges of Cryptocurrency Compliance

DOI 10.2139/ssrn.6375178

Preprint • 2026

Turkey-Iran Cryptocurrency Corridor: A Legal and Empirical Analysis of Cross-Border Cryptocurrency Flows, Sanctions Evasion Mechanisms, and Compliance Framework Design

DOI 10.2139/ssrn.6340458

Context I work from

The site is intentionally compact: the goal is to show the legal, technical, and research context without turning it into a badge wall.

Jurisdiction

Turkiye-based practice

Licensed attorney in Turkiye, focused on cross-border digital asset risk.

Memberships

ABA • ACAMS

Membership context kept factual, without overstated credentials.

Research

SSRN publications

Writing on sanctions, blockchain regulation, and enforcement.

Build

SanctionFlow + OSS

Live product work and open-source tooling for operational workflows.

Get in Touch

Email address shown as an image
LinkedIn