[deadmanoz]

Summary

174174 (0000000000000724a8c9a0d24fb1c771ae8450c144738735ae11ccf50ed76b6d) and 174182 (00000000000002afb206d0115fb643e6969ee1cb4986819ca2113950c4bdafa7) are two of the P2SH-invalid blocks of 3 April 2012, and neither had a pool. BitcoinPool.com's own solved-block history, as archived in May 2013, lists its blocks at those two heights as "Orphaned", found at 20:03:07 and 20:50:06, 7 and 1 minutes before the two headers' times. This adds pool BitcoinPool.com with pool_basis reported and that page as pool_provenance, and a sentence for the pair to the pool attributions in docs/notes.md, where the P2SH paragraph now counts five of the 91 as attributed.

The page shows no hashes, so the match rests on height and time, and neither coinbase carries a tag; the full blocks from #33 confirm both coinbases are a timestamp and an extranonce only. Both blocks' April 2012 blockchain.info pages (174174, 174182) show the same relaying node, which fits one miner but is not used here. The page turned up while sweeping mining pools' own block lists for bitcoin-data/stale-blocks#162.

The full blocks from #33 also give two descendants of the P2SH blocks coinbase tags that mining-pools lists: 175849 carries OzCoin's eco@ozco.in (ozcoin.json) and 179219 NMCbit's nmcbit.com (nmcbit.json). Both now carry pool with pool_basis tag and their coinbase_scriptsig_hex, which CI checks against the full block.

The P2SH note also records 174234 and its descendant 174053 as likely P2Pool blocks without a pool. Their coinbases pay 36 and 58 addresses, and 34 and 49 of those appear in the coinbase of 174118 on its April 2012 blockchain.info page, which records that block as relayed by P2Pool. mining-pools lists no P2Pool tag or address, so there is nothing to attribute them by yet.

Testing

• Offline python ci/sanity-check.py with a filled previous-transaction cache: 173 blocks, 173 contexts, 589 observations, 126 block files and 40 proof files; 12 reported blocks not admitted.
• python -m unittest discover -s ci -p 'test_*.py': 50 tests pass.
• python ci/generate-website.py: the block pages for 174174 and 174182 show BitcoinPool.com, 175849 OzCoin and 179219 NMCbit, and the notes page carries the new sentences.
• Every coinbase of the 108 full blocks in the P2SH incident (89 P2SH blocks and 19 descendants) was matched against the tags and addresses in mining-pools at af720b6; only the three existing tag attributions and these two descendants match.