Stolen bitcoin has one awkward property for a thief: the whole route can be replayed afterwards. When 75 BTC went to the Colonial Pipeline extortionists, the FBI followed the payment address by address, and the seizure was announced about five weeks later. The open record shows where coins went but says little about who gave the orders, and that missing name is what blockchain investigators are paid to find.
Any service that accepts deposits leaves footprints on the public ledger, whether it is an exchange, a bitcoin casino, sports betting apps or Canadian betting sites, and analysts group such footprints into clusters that can be tied back to a business. Following the money is the easier half, since naming an owner, winning a court order and gaining control of the coins each need evidence from outside the ledger.
How a Trace Unfolds
A typical investigation moves through four steps, and skipping a step usually leaves a gap that the next one cannot fill.
- Mark the first address that received the stolen coins and every transfer out of it.
- Group addresses that appear to share an owner, for example those spent together in one transaction.
- Follow splits and hops until the money reaches a service that keeps customer records.
- Pass the evidence to that service and to the authorities who can request identities.
Three Numbers From Real Cases
Court filings and press conferences supply the figures below, which mix a ransom, an exchange hack and a yearly total.
|
Case |
Stolen or paid |
Outcome |
|---|---|---|
|
Colonial Pipeline ransom, 2021 |
75 BTC, about 4.3 million dollars |
63.7 BTC recovered, roughly 85 percent |
|
Bitfinex hack, 2016 |
119,754 BTC |
About 94,000 BTC seized in February 2022, near 79 percent |
|
All hacks, 2024 |
About 2.2 billion dollars in 303 incidents |
Chainalysis estimate, up 21 percent on 2023, or about 7.3 million dollars per incident |
The cases show that the ledger supplies the map while recovery depends on evidence outside it. In the Colonial episode officials gained access to the private key of one account, with the announcement coming on 7 June 2021. At Bitfinex, a cloud-storage file listing about 2,000 addresses and their keys let agents move the funds more than five years after the theft. Blockchain analysis had tied almost all of the roughly 2,000 addresses to the hack, and about 25,000 coins had already left through laundering before the seizure.
Patterns That Draw Attention
Software flags unusual shapes in the flow before an analyst reads a single transfer, and ordinary payments rarely produce these:
- Large balances broken into many equal parcels within a few minutes.
- Long chains of fresh addresses, each passing on almost the whole amount.
- Sudden jumps between currencies or networks to break the visible link.
- Deposits that land at a service just after a theft became public.
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Expert tip. Suppose 100 coins are split into ten parcels and each parcel hops through five addresses. That makes 50 transfers to follow, yet a tracer does not need all of them: one parcel arriving at a regulated exchange is enough to ask for the account holder’s records tied to that deposit. |
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Important. A trace shows links between addresses, not guilt. Grouping rules rest on heuristics that can be wrong, and an address cluster is not the same thing as a person, so courts and platforms ask for more evidence before acting. |
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From Trail to Recovery
Platforms add a second layer. When an exchange spots a deposit that matches a reported theft, it can pause the account while it reviews the case, which turns a public trail into a practical chance to stop funds before they are converted into something harder to follow.
Tracing is a race between how quickly funds reach a service that can be contacted and how quickly they are mixed or converted. Both recoveries above took custody of keys, not just a map, which is why they stand out from traces that end at an address with no name attached. For victims the practical point is timing: a report that includes the transaction hash and the receiving address gives investigators a starting point before the funds move on.
