You challenge a blockchain analysis by checking it on three levels: whether the cited transactions and amounts are correct, whether the attributions of addresses to people or services are supported by evidence, and whether the tracing method is sound and applied consistently. Most weaknesses lie in attribution and in how funds are followed through mixing, exchanges or bridges. The result is usually a written technical review, filed by your lawyer or used in cross-examination, that the court can compare point by point with the opposing report.
Level 1: the raw data
Every transaction in the opposing report should be checked against the blockchain. Errors are more common than expected: wrong amounts, confusion between tokens on different networks, transactions counted twice, exchange rates applied at the wrong date, or fees treated as transfers.
Level 2: attribution
Claims that an address belongs to a person or a service need a source. Typical weak points:
- Clustering heuristics presented as certainties, for example treating all inputs of a transaction as one owner when coinjoin or exchange batching is involved.
- Labels taken from a commercial tool without stating their origin or confidence.
- A link between a wallet and your client inferred only from timing or amounts.
- Exchange accounts attributed without the exchange's own response in the file.
Level 3: tracing method and conclusions
When funds are mixed, split or pass through an exchange, the analyst must choose a rule to decide which part of the outflow 'comes from' which inflow. Different rules (for example first-in-first-out, proportional allocation, or following the largest amount) can produce very different results. A review asks which rule was used, whether it was applied consistently, and whether the report admits where the trail is lost, such as at a mixer, a cross-chain bridge or inside an exchange's internal ledger.
A good review is constructive as well as critical. Where the opposing analysis is correct, saying so preserves credibility; where it is wrong, the review should show the correct result, with transaction references the court can check. Whatever the legal system, courts tend to rely on the expert who explains the limits of the data most honestly.
How Advisorn helps
Advisorn Forensics reviews opposing blockchain reports independently, re-running the analysis, and delivers a signed technical review for your lawyer to file, in proceedings in different countries. In Italian criminal proceedings the managing partner can act as party-appointed technical consultant.
Updated November 2026 · General information, not legal or tax advice on your specific case.