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On-chain record · medium source confidence

Bitfinex Hack Residual Movement (2021)

Roughly a fifth of the coins taken from Bitfinex in 2016 was never recovered in the 2022 seizure. In April 2021, ten months before that seizure, two addresses holding hack-linked coins were emptied. The blockchain analytics firm Merkle Science traced part of the outflow to identifiable exchanges and the remainder to addresses that have not moved since.

Research author: · Group author: · Published 2026-08-06 · Internal review: · Corrections

Bitcoin ancestry star map for Bitfinex Hack Residual M… (2021), 5 degrees from the first bitcoin 1°2°3°4°5°SATOSHI2017201720172018BITFINEX HACK RESIDUAL…13jE99…PjHd5° FROM THE FIRST BITCOIN
5 hops from the working origin.
1 of 2 documented addresses
13jE999Hssm2GFf6Yob7zGCJtf1xnPPjHd

hack-linked address emptied in April 2021, with part of the outflow traced to exchanges

Era
2021
Script
P2PKH
First seen
August 2016
Connected
October 2018
Evidence
3 sources
First seen
August 2016
Connected
October 2018
Route display ID
5°-6491-0280Display identifier only — not proof of ownership.
2 additional population comparisons
Same-era contextCloser than 81.3% of scored addresses first seen in 2016
Connection contextConnected earlier than 61.3% of scored 5° addresses

Evidence boundary

What is — and is not — established

Attribution comes from a single commercial analytics vendor's blog, not from a court filing, and the exchanges involved are anonymised in that write-up as 'Exchange A' and 'Exchange B'. The source contains a typographical error - it prints '433,468 BTC' where the on-chain figure is 433.4689 BTC, confirmed this session via mempool.space; the companion figure of 259.74 BTC matches exactly. Both addresses are now empty. Nothing here identifies who controlled the keys in 2021.

The dossier

Evidence record

Address record

Role
hack-linked address emptied in April 2021, with part of the outflow traced to exchanges
Script
P2PKH
Category
Incident record
Source confidence
medium
Catalog reviewed
2026-08-06
View all 2 documented addresses
  1. 0113jE999Hssm2GFf6Yob7zGCJtf1xnPPjHdP2PKH · representative
  2. 021J2Tem6ZSHnpppVhBpSq5pAZYmfjENqoD3P2PKH

Source ledger

3 cited
  1. merklescience.com/…/hack-track…alysis
  2. mempool.space/…/13jE999Hss…nPPjHd
  3. mempool.space/…/1J2Tem6ZSH…ENqoD3
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