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I have found that there are some strange outputs in the Litecoin blockchain that pay small amounts to the scriptPubKey 736372697074. In ASCII, this translates to "script", reminding me of how nodes used to advertise support for P2SH by putting the string "/P2SH/" within a mined blocks coinbase's scriptSig.

The outputs have very small amounts, although they are unspendable since the 'p' ASCII character happens to correspond to OP_RETURN, and seem to show up in blocks between (roughly) blocks 81,374 and 114,829.

What are these outputs?

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Those are from an early version of P2Pool, which mistakenly sent outputs to the literal string "script" rather than the variable script. This was naturally fixed, but left lying around are a number of these outputs.

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