12VrYZgS1nmf9KHHped24xBb1aLLRpV2cT

P2PKH (1)

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Quantum exposure Reuse-exposed

P2PKH · reuse-exposed

P2PKH addresses hide the pubkey behind a SHA-256 + RIPEMD-160 hash UNTIL the first outgoing spend, which reveals it in the signature script or witness data. This address has been spent from, so its pubkey is permanently on chain. Every subsequent UTXO at this address is just as exposed as the moment of first spend.

First revealed at block 499,709 on 2017-12-17 (input_spend).

Context: Bitcoin quantum exposure report · Top exposed addresses · Quantum and Bitcoin (LearnBitcoin.com)

What we know about this address 5 findings ✓ corroborated by 4 sources

OFAC sanctioned (HYDRA MARKET)

On the U.S. Treasury OFAC SDN list under program CYBER2. SDN UID 36216. Last synced 2026-06-21.

sanctioned view
OpenSanctions: US OFAC Specially Designated Nationals (SDN) List

On the OpenSanctions consolidated sanctions list, dataset 'US OFAC Specially Designated Nationals (SDN) List'. Schema: CryptoWallet.

sanctioned view
Hydra Market

Tagged as 'Hydra Market' in GraphSense pack 'hydra' (category: market, confidence: authority_data). Cited source: https://home.treasury.gov/policy-issues/financial-sanctions/recent-actions/20220405

darknet view
WatchYourBack: username:asset-listed-under-us-treasury-ofac-sanctions-list

Tagged as 'username' (subcategory: asset-listed-under-us-treasury-ofac-sanctions-list) in the WatchYourBack tagging dataset. Sub-source: user. File: graphsense-tagpacks/20220510_graphsense_ofac.tags.

bitcoin-otc view
WatchYourBack: tormarket:hydra-market

Tagged as 'tormarket' (subcategory: hydra-market) in the WatchYourBack tagging dataset. Sub-source: market. File: graphsense-tagpacks/20220510_graphsense_hydra.tags.

tormarket view