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Bitcoin mainnet · Public custody · 2013–2015

On-chain record · medium source confidence

US FBI — Silk Road / Ulbricht Seizure (2013)

After the October 2013 takedown of Silk Road, US law enforcement moved coins from the marketplace and from Ross Ulbricht's seized hardware into a single publicly known consolidation address, in a long series of transfers reported at the time. Contemporary coverage noted the transfers were sent in chunks of 324 BTC, a number that spells "FBI" on a phone keypad. On-chain the address has received roughly 144,343 BTC in total across more than a thousand outputs and has since been almost entirely spent. The coins were subsequently disposed of through US Marshals Service auctions in 2014 and 2015.

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

Bitcoin ancestry star map for US FBI — Silk Road / Ulb… (2013), 4 degrees from the first bitcoin 1°2°3°4°SATOSHI201320132013US FBI — SILK ROAD / UL…1FfmbH…paPH4° FROM THE FIRST BITCOIN
4 hops from the working origin.
On-chain identifier
1FfmbHfnpaZjKFvyi1okTjJJusN455paPH

FBI consolidation address for coins seized from Silk Road and from Ross Ulbricht's hardware, October 2013; later drained through US Marshals auctions

Era
2013–2015
Script
P2PKH
First seen
October 2013
Connected
October 2013
Evidence
3 sources
First seen
October 2013
Connected
October 2013
Route display ID
4°-750F-94CEDisplay identifier only — not proof of ownership.
2 additional population comparisons
Global contextCloser than 97.4% of scored addresses
Same-era contextCloser than 97% of scored addresses first seen in 2013

Evidence boundary

What is — and is not — established

The address was never published by the FBI in a court filing or press release that could be retrieved here; it was identified contemporaneously by journalists and blockchain observers in October 2013 and has been universally treated as the FBI seizure address since. It is corroborated by an on-chain total (~144,343 BTC funded) that matches the ~144,336 BTC the government said it seized from Ulbricht. The USMS auction payout addresses are deliberately left null — no fetched source listed them.

The dossier

Evidence record

Address record

Role
FBI consolidation address for coins seized from Silk Road and from Ross Ulbricht's hardware, October 2013; later drained through US Marshals auctions
Script
P2PKH
Category
Public custody
Source confidence
medium
Catalog reviewed
2026-08-06

Source ledger

3 cited
  1. aljazeera.com/…/the-fbis-bitcoin-address
  2. mempool.space/…/1FfmbHfnpa…55paPH
  3. sites.law.berkeley.edu/…/the-hunt-c…-funds
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