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Laser Eyes
Unisex tee · XS–3XL
$39.99
Hover to zoomProof of Work Bitcoin Miner T-Shirt
$39.99
Bitcoin mining's core idea, or a gym motto, depending on who asks. Orange pickaxe, bold white type.
- Unisex tailored fit, sizes XS–3XL
- Free US shipping over $75, $4.99 below
- 30-day size exchanges on unworn tees
About this design
A diagonal orange pickaxe with a sturdy handle sits above PROOF and OF WORK in two lines of large white capitals.
Fabric, fit & print
| Material | Airlume combed & ring-spun cotton |
|---|---|
| Fit | Unisex tailored crew neck |
| Printed to order | |
| Sizes | XS, S, M, L, XL, 2XL, 3XL |
| SKU | BC-POWORK |
Shipping & exchanges
Ships in 3–4 business days, tracked. See the shipping policy and returns & exchanges.
The story
Behind the Proof of Work tee
In bitcoin, new blocks are earned by spending real energy, not by asking permission. This tee celebrates that idea and works just as well as a hard-work motto.
The idea came long before bitcoin. Cynthia Dwork and Moni Naor proposed in 1992 that email senders solve a small puzzle to fight junk mail, and Adam Back built Hashcash on a similar idea in 1997. The term proof of work was coined in a 1999 paper by Markus Jakobsson and Ari Juels. The bitcoin white paper cites Hashcash, and miners still race to find a valid block hash, spending electricity that makes rewriting history very expensive.
Two audiences, one shirt. Miners and node runners read it as a nod to how bitcoin is secured, and everyone else reads it as a work ethic slogan for the gym, the job site or a long shift. The pickaxe and big type make it a confident, high-visibility print.
Questions
About this design
What does proof of work actually prove?
It shows that someone spent real computing effort to produce a block. Finding a valid hash takes enormous numbers of guesses, but checking one takes a single calculation, so every node can confirm the work instantly without trusting the miner who did it.
Why is a pickaxe the symbol for bitcoin mining?
Bitcoin borrowed the word mining from gold: new coins enter circulation slowly, through effort, like digging metal out of the ground. The pickaxe is the classic prospector's tool, so it became shorthand for the whole process.
Will people outside bitcoin understand the Proof of Work tee?
Most will read it as a phrase about earning results through effort, which fits a gym bag or a workshop. Those who know bitcoin will catch the double meaning, which is half the fun of wearing it.
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