19t7RxwXdfiwQMyQ3JVB16e9HgV7omijSs

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 221,128 on 2013-02-14 (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 3 sources

megabigpower reward address (coinbase-extracted)

Received block rewards as part of megabigpower's coinbase output across 37 block(s) between heights 261530 and 262621. 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
WatchYourBack: exchange:picostocks

Tagged as 'exchange' (subcategory: picostocks) in the WatchYourBack tagging dataset. Sub-source: hacked-txin. File: graphsense-tagpacks/20210201_graphsense_hacks.tags.

exchange view
WatchYourBack: mining:megabigpower

Tagged as 'mining' (subcategory: megabigpower) in the WatchYourBack tagging dataset. Sub-source: miner. File: graphsense-tagpacks/20220510_graphsense_miners.tags.

mining pool view
hacks

Tagged as 'hacks' in GraphSense pack 'hacks' (category: uncategorized, confidence: web_crawl). Cited source: https://bitcointalk.org/index.php?topic=576337

uncategorized view
miners

Tagged as 'miners' in GraphSense pack 'miners' (category: miner, confidence: forensic). Cited source: https://github.com/MatteoRomiti/Deep_Dive_BTC_Mining_Pools/blob/master/dataset/miners.json

mining pool view