3C9sAKXrBVpJVe3b738yik4LPHpPmceBgd

P2SH (3)

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Quantum exposure Reuse-exposed

P2SH · reuse-exposed

P2SH 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 953,894 on 2026-06-16 (p2sh_nested_p2wpkh_reveal).

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

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

ultimuspool reward address (coinbase-extracted)

Received block rewards as part of ultimuspool's coinbase output across 932 block(s) between heights 733372 and 952793. Attribution derived from on-chain coinbase scriptSig tag matching plus Jameson Lopp's blocks.csv mapping; this is hard evidence the address received pool rewards under that pool's signature, not clustering inference.

mining-pool view
ULTIMUSPOOL reward address

Used by the ULTIMUSPOOL mining pool. Tags: /ultimus/.

mining pool view
Ultimus Pool reward address

Reward address for the Ultimus Pool mining pool, per the sysfix/mining-pool-addresses registry (fork of btccom/Blockchain-Known-Pools). Pool tags: /ultimus/.

mining pool view
miners_additional

Tagged as 'miners_additional' in GraphSense pack 'miners_additional' (category: miner, confidence: unspecified). Cited source: https://github.com/MatteoRomiti/Deep_Dive_BTC_Mining_Pools/

mining pool view