<p>They will either reuse the address in coinbase transaction subsidy output every time they mine a block, and then publicly claim that address, or they will "tag" their name (ascii-encoded) and some metadata in an OPRETURN or the scriptSig of the coinbase transaction. </p>

<p>Here's the coinbase TX from block 603526:</p>

<p><a href="https://blockstream.info/tx/0eb39c3f1a6813dfe5bb9d86dd71de2593aa76f25d4f25b149c9f564eb33cd54" rel="nofollow noreferrer">https://blockstream.info/tx/0eb39c3f1a6813dfe5bb9d86dd71de2593aa76f25d4f25b149c9f564eb33cd54</a></p>

<p>The script sig is</p>

<p><code>03863509fabe6d6d0f3e894118566fd52beccf2a405c060fb701171dd16d83f1fb4aa0219fa8656601000000000000002469020000535e15a74a1b00000000e6892f736c7573682f</code></p>

<p>which is ASCII for:</p>

<p><code>5  z&gt;mm&gt;   AVoU+lO*@\7Qmq{J !(ef$iS^'J /slush/</code></p>

<p>There's slushpool!</p>

CC BY-SA 4.0
2020-05-16T03:04:11.467Z
Note that anybody can put anything there. It’s not authenticated so you can just lie.
Claris
CC BY-SA 4.0
2020-05-16T03:06:00.867Z
Sure thank you. Pools could sign proof with the coinbase address but I don't know if any do.
pinhead
CC BY-SA 4.0
2020-05-16T23:00:43.547Z
They couldn’t, because the hash would cover the signature.
Claris
CC BY-SA 4.0
2020-05-16T23:02:57.063Z
I meant they could sign an arbitrary message and tweet it or whatever, proving control of the address that earned the block reward
pinhead
CC BY-SA 4.0
2020-05-16T00:56:00.333Z
2020-05-16T01:13:44.727Z
2020-05-16T01:13:44.727Z
pinhead
<p>There has been a new mining pool appearing after the halving called Lubian.com cf <a href="https://www.cryptoglobe.com/latest/2020/05/new-bitcoin-mining-pool-comes-out-of-nowhere-already-5th-largest/" rel="nofollow noreferrer">https://www.cryptoglobe.com/latest/2020/05/new-bitcoin-mining-pool-comes-out-of-nowhere-already-5th-largest/</a></p>

<p>How does a miners say to the world who he is, and how can he prove he is the one that has mined a specific block ?</p>

<blockchain><mining-pools><block><identity>
How does a miner identify himself
Saxtheowl
# How does a miner identify himself

(Asked by: username_0 on 2020-05-15)

There has been a new mining pool appearing after the halving called Lubian.com cf <https://www.cryptoglobe.com/latest/2020/05/new-bitcoin-mining-pool-comes-out-of-nowhere-already-5th-largest/>

How does a miners say to the world who he is, and how can he prove he is the one that has mined a specific block ?

**Tags:** blockchain, mining-pools, block, identity


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## 1 answers

### Answer by username_1 on 2020-05-16. Score: 1 | Accepted answer

They will either reuse the address in coinbase transaction subsidy output every time they mine a block, and then publicly claim that address, or they will "tag" their name (ascii-encoded) and some metadata in an OPRETURN or the scriptSig of the coinbase transaction.

Here's the coinbase TX from block 603526:

<https://blockstream.info/tx/0eb39c3f1a6813dfe5bb9d86dd71de2593aa76f25d4f25b149c9f564eb33cd54>

The script sig is

`03863509fabe6d6d0f3e894118566fd52beccf2a405c060fb701171dd16d83f1fb4aa0219fa8656601000000000000002469020000535e15a74a1b00000000e6892f736c7573682f`

which is ASCII for:

`5 z>mm> AVoU+lO*@\7Qmq{J !(ef$iS^'J /slush/`

There's slushpool!

> **Comments:**
> **username_2**: Note that anybody can put anything there. It’s not authenticated so you can just lie.  
> **username_1**: Sure thank you. Pools could sign proof with the coinbase address but I don't know if any do.  
> **username_2**: They couldn’t, because the hash would cover the signature.  
> **username_1**: I meant they could sign an arbitrary message and tweet it or whatever, proving control of the address that earned the block reward  

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