12QtD5BFwRsdNsAZY76UVE1xyCGNTojH9h

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 378,110 on 2015-10-09 (input_spend).

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

What we know about this address 6 findings ✓ corroborated by 4 sources

OFAC sanctioned (Xiaobing YAN)

On the U.S. Treasury OFAC SDN list under program SDNTK. SDN UID 25308. 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
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
Real-CATS: Other

Address labeled 'Other' in the Real-CATS academic dataset. Total received 99.7042 BTC across the address's lifetime.

criminal view
WatchYourBack: miscabuse

Tagged as 'miscabuse' (subcategory: n/a) in the WatchYourBack tagging dataset. Sub-source: bitcoinabuse_other. File: bitcoinabuse/20210201_bitcoinabuse.tags.

abuse view
WatchYourBack: drugtrafficking:xiaobing-yan

Tagged as 'drugtrafficking' (subcategory: xiaobing-yan) in the WatchYourBack tagging dataset. Sub-source: ofac. File: malreports/20211029_new.tags.

drugtrafficking view