What makes on-chain evidence admissible
Two questions get confused constantly: whether the blockchain data is real, and whether the record of the analysis is what it claims to be. The first is rarely contested. The second is where cases are lost.
Authentication comes first
Under Federal Rule of Evidence 901(a), the proponent must produce evidence sufficient to support a finding that the item is what the proponent claims it is. For a blockchain exhibit that splits in two: is this the ledger data it purports to be, and is this an unaltered record of the analysis that was performed? A print-out satisfies neither on its own.
Two routes, and they are not equivalent
One route is a witness: an analyst testifies to the method, the tooling, and the result, and is cross-examined on all three. The other is Rule 902(13) and 902(14) — a record generated by an electronic process, or data copied from an electronic device or storage medium, authenticated by a qualified person's written certification and by comparison of a hash value. Route two does not require the analyst to be available, willing, or still employed years later.
Why the difference is not academic
There is an established defense practice built on attacking opaque tracing: obtain the methodology, examine the analyst, and show the conclusion rested on heuristics the jury never saw. A record whose scope, inputs, and limits are stated on its face, and whose integrity can be checked by the other side without asking permission, answers that line of attack directly. A conclusion that can only be defended by its author is a different kind of exhibit.
What a hash-chained record adds
Each item is digested when it is received, and each entry links to the digest of the entry before it. Any later change to any item changes its digest and breaks the chain from that point forward. Anyone holding the artifact can recompute the digests and compare them against the recorded values through a verification URL — opposing counsel and the court included, independently and at any time.
What it does not settle
Authentication is a threshold, not a verdict. It says nothing about relevance, hearsay, the weight a finder of fact should give the analysis, or whether an attribution to a named exchange is correct. An authenticated record of a wrong conclusion is still a wrong conclusion, faithfully preserved.
Where PEGTrace sits
PEGTrace is a composition layer, not a tracing vendor. A report from Chainalysis, TRM, Elliptic, or an independent investigator is an input: it is preserved intact, digested on receipt, and attributed to whoever supplied it. Their analysis stays theirs. What PEGTrace produces is one tamper-evident record of everything the case has gathered, with a single URL that verifies it has not been altered.
PEGTrace records and composes evidence. It does not recover funds, determine guilt, or replace an investigator. What a trace produces is a lead, not proof.
This page describes general practice and rules of evidence in plain terms. It is not legal advice, and PEGTrace does not practice law. Counsel decides what is filed, argued, or offered.
Learn about PEGTrace pilots for institutions, counsel, and law enforcement
PEGTrace is an evidence and case-management tool for financial institutions, legal counsel (plaintiff and defense), and law enforcement. These pages are public awareness resources. If you evaluate fraud tooling for an institution, a law firm, or an investigative unit, we would like to talk.