Bitcoin Audit Services
Professional Bitcoin blockchain investigation. Track BTC transactions through the UTXO model, cluster related addresses, and document the complete provenance of your Bitcoin holdings back to their original mining.
Bitcoin Blockchain
The original cryptocurrency since 2009
Bitcoin is the original cryptocurrency and remains the most valuable digital asset by market capitalization. As the longest-running blockchain, Bitcoin has a complete transaction history dating back to January 2009—over 15 years of traceable activity.
Bitcoin's UTXO (Unspent Transaction Output) model fundamentally differs from account-based blockchains like Ethereum. Instead of account balances, Bitcoin tracks individual "coins" as they're created through mining, split through payments, and combined through consolidation. This creates a unique graph structure that requires specialized analysis techniques.
Our Bitcoin audit services leverage deep expertise in UTXO analysis, address clustering algorithms, and the Bitcoin ecosystem to provide accurate, comprehensive documentation that banks, courts, and regulatory authorities accept worldwide.
Bitcoin Specializations
- • Full UTXO graph traversal back to coinbase
- • Common-input address clustering
- • Change output detection & analysis
- • All address types (Legacy, SegWit, Taproot)
- • Exchange deposit/withdrawal identification
- • Mining pool attribution & rewards tracking
- • CoinJoin & mixer identification
- • Lightning Network on-chain analysis
Why Do You Need a Bitcoin Audit?
Understanding the unique challenges of documenting Bitcoin holdings
Bitcoin's UTXO Model Creates Complexity
Unlike bank accounts where you have a simple balance, Bitcoin uses UTXOs—discrete "coins" that split and combine. A wallet that received 10 BTC five years ago and made various transactions might now have dozens of UTXOs across multiple addresses, making it extremely difficult to understand or document without specialized analysis.
Block explorers show raw transactions but don't explain what happened or trace provenance. Our analysis transforms this complexity into clear documentation showing exactly where your Bitcoin came from and how it moved.
Early Holders Face Unique Challenges
If you acquired Bitcoin years ago—especially before 2015—you may face significant documentation challenges. Exchanges have closed, records were lost, and transaction history spans years of activity. Yet banks and tax authorities increasingly demand proof of where your Bitcoin came from.
Our expertise with historical Bitcoin analysis means we can trace holdings back through defunct exchanges, early mining, and years of transactions to establish legitimate provenance.
Common Situations Requiring Bitcoin Audits
Banking & Finance
- • Large deposit documentation
- • Mortgage applications
- • Account opening compliance
- • Wealth management onboarding
Legal & Estate
- • Estate inheritance documentation
- • Divorce asset discovery
- • Asset seizure defense
- • Court evidence preparation
Tax & Compliance
- • Tax audit response
- • Cost basis calculation
- • Mining income documentation
- • Capital gains verification
Bitcoin Audit Use Cases
Real-world scenarios where our Bitcoin expertise delivers results
Early Bitcoin Holder Documentation
An individual who acquired Bitcoin in 2013 needs to prove legitimate ownership for a bank account opening. Our audit traces their BTC from Mt. Gox withdrawal records and early Coinbase purchases, providing documentation that satisfies modern banking compliance requirements despite the age of the holdings.
Mining Operation Verification
A Bitcoin miner needs to prove their BTC was legitimately earned through mining for tax purposes. We document the complete mining history by analyzing coinbase transactions, pool payouts, and consolidation patterns to create tax-ready documentation.
Estate Bitcoin Recovery
Following the death of an early Bitcoin adopter, family members need to document and claim inherited BTC. Our investigation identifies all related addresses through clustering analysis, documents the provenance for estate purposes, and provides evidence for legal proceedings.
Law Enforcement Asset Tracing
Law enforcement agencies need to trace stolen Bitcoin through multiple wallets and potential mixing services. Our analysis maps the complete path of funds, identifies exchange touchpoints where assets can be frozen, and provides court-admissible evidence.
OTC Trade Verification
A high-net-worth individual purchasing Bitcoin through OTC desks needs to verify the coins aren't tainted. We provide pre-trade analysis checking the provenance of offered BTC and post-trade documentation proving the legitimacy of acquired coins.
Institutional Compliance
A fund accepting Bitcoin investments requires source of funds documentation for each contribution. Our systematic approach processes multiple deposits, traces each to legitimate sources, and provides institutional-grade compliance documentation.
Bitcoin Analysis Capabilities
Comprehensive technical coverage for the original cryptocurrency
UTXO Graph Analysis
Complete tracking through Bitcoin's unspent transaction output model, following how coins split and combine across transactions.
Address Clustering
Identify related addresses through common input heuristics, change detection, and behavioral analysis.
Exchange Detection
Identify deposits and withdrawals from major exchanges including Coinbase, Binance, Kraken, and hundreds more.
Mining Pool Attribution
Track mining rewards back to specific pools with coinbase transaction analysis and payout pattern recognition.
CoinJoin & Mixer Detection
Identify Wasabi, Samourai, JoinMarket and other mixing transactions with probability analysis.
Lightning Network Analysis
Track Lightning channel opens, closes, and force-closes with on-chain footprint analysis.
Taproot & SegWit Support
Full support for all Bitcoin address types including legacy, SegWit, nested SegWit, and Taproot.
Historical Provenance
Trace Bitcoin back to its original coinbase mining transaction for complete historical documentation.
Our Bitcoin Audit Methodology
A specialized approach for Bitcoin's unique UTXO architecture
Address Discovery & Clustering
Starting from your known addresses, we identify all related addresses through advanced clustering techniques. Common-input heuristics reveal addresses used together in transactions. Change detection identifies outputs returned to your wallet. Behavioral analysis finds additional addresses with matching patterns. This ensures we capture your complete Bitcoin footprint, including addresses you may have forgotten.
UTXO Graph Analysis
We trace every UTXO backward through the transaction graph. Each bitcoin has a chain of custody from its creation (coinbase mining transaction) through every subsequent transaction until it reached your wallet. We document this complete provenance, showing where each fraction of BTC originated—whether from exchange withdrawals, mining, peer-to-peer trades, or other sources.
Entity Identification
As we trace UTXOs, we identify known entities along the path. Our extensive database includes major exchanges (Coinbase, Binance, Kraken, and hundreds more), mining pools (F2Pool, Antpool, Foundry, etc.), payment processors, and other services. We also flag interactions with mixers, sanctioned addresses, or high-risk entities for compliance purposes.
Comprehensive Documentation
All findings are compiled into professional reports appropriate for your use case. Bank-focused reports emphasize source verification with clear evidence chains. Legal reports include detailed methodology suitable for court proceedings. Tax reports provide transaction categorization and can include cost basis calculations. All reports include blockchain verification links for independent validation.
Who Needs Bitcoin Audit Services?
We serve clients who need professional Bitcoin documentation
Long-Term Holders
Early Bitcoin adopters needing to document holdings acquired years ago from exchanges that may no longer exist.
Bitcoin Miners
Mining operations requiring documentation of mined BTC for tax purposes, business accounting, or sale verification.
Legal Professionals
Attorneys handling crypto asset cases requiring expert Bitcoin tracing and court-ready documentation.
Compliance Teams
Organizations processing Bitcoin requiring source verification for AML compliance and risk management.
Bitcoin Audit Services
Specialized services tailored to Bitcoin's unique architecture
Source of Funds
Trace BTC origins through the UTXO graph back to exchanges, mining, or early acquisitions with complete provenance documentation.
- Exchange identification
- Mining attribution
- Early holder analysis
- Complete provenance
Transaction Tracking
Follow Bitcoin through complex transaction chains, across multiple addresses, with mixer and CoinJoin analysis.
- UTXO tracing
- Cluster analysis
- Mixer identification
- Path mapping
Wallet Analysis
Comprehensive Bitcoin wallet profiling with address clustering, balance history, and risk assessment.
- Address clustering
- Balance history
- Risk scoring
- Entity identification
Trusted Bitcoin Expertise
Our team has been analyzing Bitcoin since the early days, developing deep expertise in the unique challenges of the original cryptocurrency.
Bitcoin history since genesis
Addresses in our database
Countries served
Coinbase traceability
Bitcoin Audit FAQ
What is a Bitcoin audit and why is it different from other crypto audits?
A Bitcoin audit traces the origin and movement of BTC through its unique UTXO (Unspent Transaction Output) model. Unlike Ethereum and other account-based blockchains, Bitcoin doesn't have "accounts"—instead, you own specific outputs from previous transactions. This requires specialized tracking techniques including UTXO graph analysis, address clustering, and change detection. Our Bitcoin-specific expertise ensures accurate tracing even through complex transaction patterns.
How do you track Bitcoin with the UTXO model?
Bitcoin's UTXO model means every transaction consumes previous outputs and creates new ones. We trace the complete UTXO graph, following how bitcoins split when you make payments and combine when you consolidate funds. This allows us to provide complete provenance from any bitcoin back to its original coinbase (mining) transaction, no matter how many transactions occurred in between.
Can you identify Bitcoin mixers and CoinJoin transactions?
Yes, we identify transactions with mixing characteristics including Wasabi Wallet CoinJoins, Samourai Whirlpool, JoinMarket, and older mixing services. While mixers are designed to obscure transaction links, we can document when funds entered mixing services, identify probable output paths through timing and amount analysis, and flag mixed funds for compliance purposes.
Do you support all Bitcoin address types?
Yes, we provide complete support for all Bitcoin address formats: Legacy addresses (starting with 1), P2SH and nested SegWit (starting with 3), native SegWit/Bech32 (bc1q...), and Taproot/Bech32m (bc1p...). Our analysis works seamlessly across address types and correctly tracks funds moving between different formats.
How far back can you trace Bitcoin?
We can trace Bitcoin all the way back to its genesis—the original coinbase transaction where it was mined. Bitcoin's complete transaction history is preserved on the blockchain since 2009, allowing us to document the full provenance of any BTC. This is particularly valuable for early holders who need to prove legitimate long-term ownership.
Can you help with Bitcoin from defunct exchanges like Mt. Gox?
Yes, we have extensive experience tracing Bitcoin from early and defunct exchanges including Mt. Gox, BTC-e, and others. We can document withdrawal histories, trace coins through subsequent transactions, and provide evidence linking current holdings to historical exchange activity. This is especially valuable for rehabilitation claims and proving long-term ownership.
What is address clustering and how does it help?
Address clustering uses heuristics to identify multiple addresses likely controlled by the same entity. When addresses are used together as inputs in a transaction (common input ownership), they're almost certainly controlled by the same person. We also use change detection and behavioral patterns. This helps identify all addresses in a wallet, even ones the owner may have forgotten about.
Can you analyze Lightning Network activity?
We analyze the on-chain footprint of Lightning Network activity, including channel open and close transactions, force closes, and routing node operations. While Lightning transactions themselves are off-chain and private, the channel operations leave traceable on-chain records that we can document and analyze.
How long does a Bitcoin audit take?
Standard Bitcoin audits are completed within 5-7 business days. Complex cases involving extensive transaction history, multiple wallets, or historical data from early Bitcoin may take longer. We offer priority (2-3 days) and urgent (24-48 hours) processing for time-sensitive matters. The timeline is also affected by whether mixer analysis is required.
Will banks accept your Bitcoin audit reports?
Yes, our Bitcoin audit reports are designed specifically to meet banking compliance requirements. We've successfully provided documentation accepted by major banks worldwide, including for large deposits, mortgage applications, and wealth management account openings. Our reports include the methodology explanation and verification links that compliance departments require.
Ready for Your Bitcoin Audit?
Get professional, legally-accepted documentation of your BTC transactions and complete provenance back to their original mining. Our Bitcoin experts are ready to help.
Free consultation • No obligation • Response within 24 hours