By the end, you’ll be able to…
- Convert a small amount between BTC and sats.
- Explain the different jobs of signatures, nodes and proof of work.
- Recognize what a payment record cannot prove.
One bitcoin. A hundred million small units.
A small unit is a useful place to start
Bitcoin lets people send value over a shared network. BTC is a unit used to express the amount. One BTC equals 100,000,000 satoshis, usually shortened to sats. You do not need to use a whole BTC: 1,000 sats is 0.00001000 BTC, and 100,000 sats is 0.00100000 BTC.
Write the unit every time. Imagine a poster has an illustrative price of 25,000 sats. That is 0.00025000 BTC. The conversion tells you the quantity, not what it is worth in your local currency or whether the poster is fairly priced.
Follow the source: Bitcoin developer guide · Payment processing and units
Who checks the rules?
A digital signature authorizes spending. Nodes running Bitcoin software check transactions and blocks against the rules they enforce. Miners compete to find proof of work for new blocks. Proof of work makes producing blocks costly and checking that work comparatively easy.
These roles fit together: a miner cannot make an invalid transaction acceptable to a node simply by doing more work. The system is designed to let participants verify a shared payment history without one central bookkeeper.
Follow the source: Satoshi Nakamoto · Bitcoin: A Peer-to-Peer Electronic Cash System
Verification has limits
A payment record is evidence that value moved under the network’s rules. It does not tell you whether a seller delivered a painting, a meal was safe or a community organizer kept a promise. Those questions need people, clear agreements and evidence from the world.
At Satnam Satoshi, proof of service means a proposed process of human review. It is separate from Bitcoin’s proof of work. A meal claim is not mining, and generating a report does not create bitcoin or an automatic reward.
A standard for our own work
Our use of “Nakamoto standard” describes a project commitment: make rules understandable, make evidence checkable and reduce unnecessary dependence on one provider. It is not a new technical standard or an endorsement by Bitcoin’s creators.
Start with questions: What is the claim? Where is the source? What can I verify myself? What still depends on somebody else? You can use those questions before you hold any bitcoin.
Try a conversion on paper
A sample contribution is described as 0.00050000 BTC. How many sats is that? What extra information would you need before deciding whether any real payment is appropriate?
I’ve tried it — show the worked answer
It is 50,000 sats: multiply the BTC amount by 100,000,000. You would still need the purpose, recipient, agreed terms and fees. The example is a unit exercise, not a request to pay.
Want to explore with buttons and instant feedback? Try the practice lab ↗
Make a choice. Discover why.
Choose an answer and check the explanation. You can retry as often as you like. These are practice questions, not a test of mastery; answers are not saved or sent.
One idea to take with you
Count carefully, check the rules and ask what the evidence actually establishes.
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