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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 255,507 on 2013-09-01 (input_spend).

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

What we know about this address 2 findings ✓ corroborated by 2 sources

hhtt reward address (coinbase-extracted)

Received block rewards as part of hhtt's coinbase output across 1 block(s) between heights 250968 and 250968. 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
P2Pool miner (coinbase-extracted)

Received P2Pool decentralized-mining rewards across 442 block(s) between heights 249575 and 296783. Detected via P2Pool scriptSig marker variant or coinbase output to a known forestv-style P2Pool donation address.

p2pool-miner view