nyuuzyou/wikis huggingface dataset:
Casascius 1000 BTC gold coin

The Casascius 1000 BTC gold coin is the highest denomination coin ever produced by Casascius. It is also the most valuable physical bitcoin ever produced, with one selling for $1 million in 2013. The token is made of an ounce of fine gold, which at the time of production was about one third the value of the 1000 BTC. The coin could be ordered directly from Casascius for approximately $5,500.
Five coins were produced that utilized one private key. Of those, one has been redeemed. An undisclosed amount of coins with two keys were also minted.
As the value of bitcoin rose through the April and November 2013 bubbles, the value of this unopened token quickly appreciated, going from $10,000 to $1 million. As of March 2015, a reasonable price is $300,000.
With the rise in value of Bitcoin in late 2017, as of January 2018, 1000 BTC is worth ~$15,000,000.00 USD, making the 1000 BTC Casascius coin likely the most valuable coin in the world.
Category:Physical bitcoins
Category:Casascius coins
Casascius Bitcoin Analyzer

The Casascius Bitcoin Analyzer is a website which displays stats for the 29,000 bitcoin addresses used for the Physical Bitcoin project. The website went live on November 21, 2011 and was the first Casascius Coin analyzer of it's kind to successfully scan Casascius Bitcoin addresses. 
An Ad for the Casascius Bitcoin Analyzer can be found in Issue #1 of the Bitcoin Magazine.
Features of the website include:
* Daily Casascius Bitcoin Stats
* Live Search Bar
* Silver, Gold and mtgox Real-time prices
* Individual Casascius Bitcoin Pages (example)
* Weekly Reports - Every Monday
* Tables, Charts and Graphs
* Casascius Markup Pricing Table - Markup Pricing for Casascius Bitcoins
* MemoryDealers Markup Pricing Table - Markup Pricing for Memory Dealers
* Image stats - Stats at a glance!
* Owners List - A list of Casascius Bitcoin Owners, not meant to be 100% accurate. 
* JSON API - For use on your website or Program!
* Twitter Feed - Updates every 3 hours!
* Support
CashU

A cash-based payment network.
At some Bitcoin exchanges, such as Bitcoin Nordic , Bestexchangeonline.com, CashU is a payment method that can be used to purchase bitcoins.
==Adding Funds==
* CashU prepaid cards.
* UKash vouchers - purchased with cash in thousands of locations in many countries.
* Other regional funding services
==Where To Purchase CashU Cards==
===Retail===
CashU prepaid cards can be purchased at thousands of locations in many countries.
Country name 	Currency 	Symbol	Notes / Alternate
Algeria (DZA) 	Algerian dinar 	DZD 	Algerian dinars
Bahrain (BHR) 	Bahraini dinar 	BHD 	Bahraini dinars
Egypt (EGY) 	Egyptian pound 	EGP 	Egyptian pounds
Iraq (IRQ) 	Iraqi dinar 	IQD 	Iraqi dinars
Israel (ISR) 	Isreali new shekel 	ILS 	Israeli new shekels (NIS)
Jordan (JOR) 	Jordanian dinar 	JOD 	Jordanian dinars
Kuwait (KWT) 	Kuwaiti dinar 	KWD 	Kuwaiti dinars
Lebanon (LBN) 	Lebanese pound 	LGP 	Lebanese pounds
Libya (LBY) 	Libyan dinar 	LYD 	Libyan dinars
Mauritania (MRT) 	Mauritanian ouguiya	MRO 	Mauritanian ouguiyas
Malaysia (MYS) 	Malaysian ringgit 	MYR 	
Nigeria (NGA) 	Nigerian naira 	NGN 	
Oman (OMN) 	Omani rial 	OMR 	Omani rials
Palestine (PLS) 	n/a 	n/a 	CashU purchases in Palestine made with U.S. Dollars / USD.
Pakistan (PAK) 	Pakistani rupees 	PKR 	Pakistani rupees
Qatar (QAT) 	Qatari riyal 	QAR 	Qatari riyals
Saudi Arabia (SAU) 	Saudi riyal 	SAR 	Kingdom of Saudi Arabia (KSA) - Saudi Arabian riyals
Tanzania (TZA) 	Tanzanian shilling 	TZS 	United Republic of Tanzania - Tanzanian shillings
Turkey (TUR) 	Turkish lira 	TRL 	Turkish liras or lire
Tunisia (TUN) 	Tunisian dinar 	TND 	Tunisian dinars
Yemen (YEM) 	Yemeni rial 	YER 	Yemeni rials
United Arab Emirates (UAE)	UAE dirham 	AED 	UAE darahim (or dirhams)
===Online===
Methods for making purchases using CashU online is available from:
Algeria, Australia, Bahrain, Belgium, Canada, Gambia, Germany, Ghana, India, Iraq, Israel, Jordan, Kenya, Kuwait, Lebanon, Libya, Malaysia, Mauritius, Morocco, Nepal, Nigeria, Oman, Pakistan, Palestine, Russia, Saudi Arabia, Sierra Leone, South Korea, Spain, Tanzania, Tunisia, Turkey, United Arab Emirates, United Kingdom, United States, Yemen
==See Also==
* Payment methods
* List of digital currencies
* Buying bitcoins
* Selling bitcoins
==External Links==
* CashU.com website
Category:Money transmitters
Cashila

Cashila is a fully licensed euro and bitcoin payment processor. It operates as a Euro Wallet which lets users send money (pay bills, cash out bitcoins), receive money (third-party deposits), keep funds in it or convert to bitcoin.
Cashila was established in the Czech republic July 2014 and has conducted business out of Ljubljana, Slovenia since the beginning of 2015. They has so far joined forces with two reputable companies in the Bitcoin ecosystem - Mycelium and Trezor.
As of My 2016 the team behind Cashila launched a new service for buying and storing crypto assets named ICONOMI. 
==Key features==
===Pay bills===
Cashila allows users to send money to any SEPA bank account via bitcoin. Cashila converts bitcoin to euro and sends euro to the receiving bank account via SEPA.
===Accept bitcoin payments=== 
Users can receive bitcoins, which convert to euros as soon as they hit the Cashila account.
===Accept euro payments=== 
Users can receive euros, keep funds in the account, convert to bitcoin and send to a bitcoin wallet or to any SEPA bank account
==Freelancers==
Freelancers can request payments in bitcoin or EUR an submit the invoice to their clients . 
==Fees==
1% fee on incoming transaction.
==History==
The service first launched (beta) in 2013. Officially it became available in the beginning of 2014.
On June 2, 2015 Cashila publicly announced its integration with the Mycelium Wallet app Cashila now enables you to make SEPA payments from Mycelium Wallet. The both services got integrated even more in January 2016 with the Mycelium Wallet app update Smoother and fee-free payments for Mycelium Wallet users.
On August 25, 2016 ICONOMI announced Initial Coin Offering (ICO) ICONOMI Initial Coin Offering (ICO) aiming to develop the ICONOMI Open Fund Management platform (OFM) and two types of new financial instruments - the ICONOMI Coin Traded Fund (CTF) and the ICONOMI Coin Managed Fund (CMF).
cashila.com: "Cashila retail service officially closed. As of 1 June 2017 we are no longer offering our services for retail customers."
==External Links==
* Cashila.com website
* ICONOMI website
==References==
Category:Defunct exchanges
Category:Payment Processors
CatLab Bitcoin Gateway

CatLab Bitcoin Gateway is an apparently inactive project to develop bitcoin processing backend software. It was developed by Catlab Interactive for their own purposes and somewhat opened to the public. The project now appears to be on hiatus with a message on the main CatLab Interactive website CatLabs news page stating that they suffered a significant security breach in September 2012.
==External links==
* CatLab Bitcoin website
== Similar services ==
* BitUtils Merchant
* Bitcoin PayFlow
== References ==
Celery

Celery is an easy, secure and fast way to use bitcoin.
Celery is a hosted web-based EWallet used for sending, receiving, and storing bitcoin. People with a U.S. bank account can buy bitcoin via bank transfer.
==Services==
===Buy bitcoin===
* Celery enables users to purchase the top 3 digital currencies by directly transferring money from a bank account 
* To buy digital currency, you must connect a US bank account. You can verify their bank instantly (by providing your bank account credentials) or via micro-deposits, which takes 2-3 business days to complete. The bank verification process is very similar to PayPal's and Venmo's.
* The price of the digital currency is locked in at the time of order placement. The digital currency you order is released to your Celery account in 3-4 business days.
===Send Money===
* You can send bitcoin to another Celery user by entering the email address they use for their Celery account. You can also send money to digital currency addresses outside of Celery. 
* The amount of digital currency sent can be determined by entering a value in either USD (converted to the chosen digital currency based on the current exchange rate) or the quantity of the digital currency you choose. 
===Deposit Money===
* You can deposit bitcoin to your Celery account from another wallet or exchange service.
==Fees==
* There are no fees for sending, receiving, or storing bitcoin.
* The fee for buying bitcoin is 1%.
==Security==
* Multi-factor authentication for user accounts.
* Various company security measures and practices including: cold storage, bug bounty program, audited code, encryption, penetration testing and back ups.
* Cold storage of customer funds and Transparency page showing the distribution of funds stored cold vs hot [https://www.gocelery.com/#transparency Celery Transparency page.
==History==
Celery was announced on July 25, 2014 Market Wired - Celery launches to bring digital currency directly to consumers.
At launch, Celery was reviewed by Coindesk Coindesk - Celery launches consumer friendly bitcoin and dogecoin buying service.
On Sept 10, 2014, Celery added Mutli-Factor Authentication Celery adds Multi-Factor Authentication.
On Oct 3, 2014, Celery announced it's Transparency page [http://blog.btxtrader.com/post/99067421648/celery-is-changing-the-face-of-digital-currency Celery is changing the face of digital currency [http://newsbtc.com/2014/10/03/celery-introduces-transparency-page-informative-stats/ Celery introduces 'transparency page' with informative stats.
==External Links==
* Celery website
==References==
Category:EWallets
Category:Wallets
Category:Exchanges
Category:Shopping Cart Interfaces
Category:Services
Category:Frontends
Category:Clients
Central economic planning

A system of top-down authoritarian decision making. Central economic planning was the theoretical system of resource allocation in soviet and socialist forms of government in which private property was abolished and State control of the means of production was enforced.
The basic theory of Central economic planning was that a committee of experts could much more rationally and efficiently direct a country's resources than the chaotic decentralized actions of millions of individuals through the market mechanism. Central planners would set prices, production targets and allocate resources and personnel to strategic industries and priorities.
== Criticisms ==
Early critics of Central economic planning, especially Ludwig von Mises, pointed out the Economic calculation problem in the absence of market prices. Others criticisms include the difficulty of engineering and planning in complex systems with emergent properties (Friedrich Hayek) and problems of incentives and regulatory capture (public choice theory).
== Current examples ==
* Central Banking
* Price Controls
* National Monopolies
* Minimum wage
Cgminer for Mac OS X

:This page is about Mac OS X compatible distributions of cgminer. For the project page of the version produced by Kerry Cupit, see cgminer for Mac OS X (project).
There are several unofficial projects which compile CGMiner for use with Mac OS X:
* cgminer and bfgminer for Mac OS X
* cgminer for Mac OS X (project)
* How to compile cgminer and bfgminer with Homebrew for Mac OS X
* xgminer
Some of the above projects have also been incorporated into Mac-compatible graphical user interface (GUI) wrappers, which often present a more feature-rich experience for the normal desktop user.
* Asteroid
* MacMiner
* MultiMiner
Category:MinersCategory:SoftwareCategory:Open SourceCategory:Free Software
Cgminer for Mac OS X (project)

cgminer for Mac OS X is the name of an unofficial binary distribution of CGMiner for Mac OS X computers. It contains precompiled universal binaries (for Mac OS X 10.5+ on PPC/Intel) and includes the necessary libraries required to make them run, contained in a single package. The website contains all compilable versions released by the official cgminer developers since version 3.3.1.
A launcher script is included to simplify entering command-line options, which then opens a Terminal window running cgminer. Commands are remembered between subsequent launches.
===Requirements===
* Mac OS X 10.5 PPC (USB mining only)
* Mac OS X 10.6+ PPC or Intel 32/64bit (USB or OpenCL-based mining)
==See Also==
* Asteroid
* cgminer for Mac OS X (list of Mac OS X compatible distributions of cgminer)
* MacMiner
* bfgminer for Mac OS X
==External Links==
* cgminer for Mac OS X project website
* cgminer for Mac OS X discussion forum
* cgminer (official)
Category:MinersCategory:SoftwareCategory:Open SourceCategory:Free Software
Chain Reorganization

The term "blockchain reorganization" is used to refer to the situation where a client discovers a new difficultywise-longest well-formed blockchain which excludes one or more blocks that the client previously thought were part of the difficultywise-longest well-formed blockchain. These excluded blocks become orphans.
Chain reorganization is a client-local phenomenon; the entire bitcoin network doesn't "reorganize" simultaneously.
== See also ==
* Irreversible Transactions
Category:Vocabulary
ChangeTip

ChangeTip integrates payment processing with social media and the web at large to transform the idea of a "share" into a method of financial appreciation, redefining the way people think about purchasing goods and services. Instead of broadcasting a tip as a bitcoin transaction, a separate ledger is kept by ChangeTip, only pushing on-chain transactions when a user withdraws funds from the service. Tipping has been made possible on GitHub, Google+, Reddit, StockTwits, Tumblr, Twitter and YouTube.
==History==
ChangeTip was founded on December 17th, 2013.ChangeTip Crunchbase Page It gained significant notoriety in November 2014, when tipping small amounts of bitcoin became a viral practice on Reddit and Twitter, causing exponential growth in users and tips. This has caused significant use of bits as a unit of bitcoin.
==Criticism==
===Terms and Conditions===
Tippers and tippees of ChangeTip are required to agree to a long list of terms and conditions.ChangeTip Terms and Conditions As per these conditions, they must agree to waive their right to a trial by jury. Additionally, they must give up their right to reverse engineer the service. Some people find these terms unreasonable, and choose to deny the tips that others may wish to send them via ChangeTip.
==See Also==
==External Links==
* ChangeTip Website
* How to Setup a Changetip Bitcoin Wallet Online
==References==
Category:EWallets
CheckSequenceVerify

CheckSequenceVerify (or CSV) is an opcode that implements a type of timelock, controlling the execution pathways of a script based on the age of the output being spent.
CSV is used to implement Lightning Network transactions.
== References ==
BIP112: CHECKSEQUENCEVERIFYBtcDrak, Mark Friedenbach, Eric LombrozoRetrieved 2016-04-12
Checkpoint Lockin

Every once in a while, an old block hash is hardcoded into Bitcoin software. Different implementations choose different checkpoint locations.
Checkpoints prevent various DoS attacks from nodes flooding unusable chains and attacks involving isolating nodes and giving them fake chains, but it is primarily an optimization for the initial blockchain download.
Satoshi announced the feature here and it was discussed to death here.
Some alt chains use different forms of checkpointing, eg as an ongoing "central checkpointing pulse" that isn't updated only on software updates.
Category:Technical
ChromaWay

==ChromaWay==
ChromaWay was founded in 2014 and is an early pioneer of what is now dubbed as "blockchain 2.0" technology. Combining great blockchain experts ChromaWay provides a platform for smart contracts and issuing and transferring assets through a blockchain. We recently announced our partnerships with LHV bank in Estonia and Funderbeam which are leveraging the ChromaWay platform.
===Colored Coins===
ChromaWay Created the first Colored coins implementation: The EPOBC protocol which allows you to store assets on the [blockchain]. There are many interesting applications to colored coin. You could have an IPO on the blockchain by issuing shares as colored coins, and send them to your shareholders. The shares can then be traded almost instantaneously and for free through the Bitcoin blockchain. You could have smart properties represented by colored coins. You could store your house on the blockchain by issuing a single coin, then the ownership of the house can be transferred with a simple Bitcoin transaction.
===Specifications===
ChromaWay is implementing the EPOBC protocol.
===External Links===
*ChromaWay's website
*ChromaWallet is a desktop coloredcoins wallet
*The EPOBC specification
*ChromaWay's github full open-source library
*JavaScript Colored Coins library
*Follow ChromaWay in twitter
Church of Bitcoin

The Church of Bitcoin was founded on August 7th, 2017 by Henry Romp and Aprexer.
There have been past projects of the same name, but they were either intended as satire, or abandoned after some time. This one is sincere. The home page of the church is http://churchofbitcoin.org.
They have announced plans to file as a 501(c)3 and seeking tax-exempt status as a church, and have registered with the IRS under EIN #82-2484856 
To join the church as a full verified contributing member, a bitcoin transaction of at least one satoshi is required. A one-time payment of one satoshi guarantees lifetime membership in the Church of Bitcoin. You will also be asked to provide your real name and contact information; a home address is not necessary but a valid email will be required.
In the future, they plan to have packages available with benefits such as t-shirts, patches, etc. for contributing members.
The Church of Bitcoin has a simple and clear mission: To free the world from the oppression that is currently enabled by government and central bank control over exchange. 
Members subscribe to the following:
# They believe that any two consenting parties should be able to freely exchange or trade without any governing body or third party interfering with their transaction 
# They believe that bitcoin will enable us to achieve that reality
# They distribute our scripture, the whitepaper written by prophet Satoshi Nakamoto
# They declare "In cryptography we trust" as a slogan/mantra 
# They embrace open-source philosophy and freedom of information
Various positions in the Church are open and the Church is actively seeking members and staff to fill these positions; the openings include positions for Pastors and Deacons.
There are gatherings held online in the freenode IRC chat room at #churchofbitcoin , and the physical church itself is at 124 Dewey Road in Salisbury Vermont, 05769 in the upstairs space above the tack room at Salisbury Station Stables; services are held there on Sundays and are open to verified registered members.
Inquiries can be directed to info@churchofbitcoin.org
Mailing address is:
Church of Bitcoin
158 Dewey Rd
Salisbury, Vermont, 05769
RSA public key fingerprint:
21520D5B114FC50E2B429C264C6D7E488D993CE5
Church of Bitcoin is the first Church celebrating the prophet Satoshi Nakamoto and the living lord embodied in the blockchain.
==See Also==
https://en.bitcoin.it/wiki/Bitcoin_Church
Category:Candidates for cleanup
Ckpool

:This article is about the mining pool backend software. For other uses, see Ckpool (disambiguation).
ckpool is a ultra low overhead massively scalable multi-process, multi-threaded modular bitcoin mining pool, proxy, passthrough, library and database interface in c for Linux.
It was announced on 21. September 2014 https://bitcointalk.org/index.php?topic=790323.0 CKPOOL - Open source pool/database/proxy/passthrough/library in c for Linux. It is developed by Con Kolivas and Andrew Smith under the GPLv3 license. The source code is available from https://bitbucket.org/ckolivas/ckpool.
The developers can be contacted on IRC channel: irc://irc.freenode.net/ckpool.
==List of current ckpools implementations==
KanoPool: http://www.kano.is
solo.ckpool: http://solo.ckpool.org (anonymous solo mining)
testnet.solo.ckpool: http://testnet.ckpool.org (testnet only)(offline)
==See also==
* Comparison of mining pools
* Pooled Mining
==References==
Category:Mining
ClearCoin

ClearCoin is an escrow-type of service that allows safer payment by securely holding coins in escrow until both buyer and seller are satisfied.
Note - this service is closed to new escrow listings.
Sometimes there is a risk that a buyer will be unhappy with a purchase but no recourse is possible because Bitcoin transactions are not reversible. An escrow allows the buyer to send payment to an intermediary and release the funds only at such time the buyer is satisfied with the seller's level of service.
ClearCoin escrow simply acts as a time lock for a bitcoin person to person transaction. After sending payment to escrow, either the escrow can be released and ClearCoin will forward the escrowed amount to the seller, or the escrowed funds are held until the expiration date (options available are 1 month, 6 months and 1 year escrow expirations) before the payment will be returned to the buyer.
When the buyer refuses to release the escrowed amount, the delay in getting those funds returned may be an incentive to try to work things out with the seller. For the seller, there still is the risk that the buyer will have received the goods or service and then still refuse to release payment. ClearCoin does not mediate disputes.
The web application runs on Google App Engine and the escrowed funds are held on a more secure server hosted with Amazon EC2Interview: How Bitcoin Created a Decentralized Crypto-Currency.
==Transactions==
After bitcoins are sent to ClearCoin escrow, three confirmations are required before the escrow can be releasedDoes it take awhile for bitcoins to show up in a clearcoin escrow?.
==History==
This service was first made available on December 7th, 2010ClearCoin: for safer bitcoin transactions. The service was closed to new registrations on June 24, 2011ClearCoin Closing.
==External Links==
* CearCoin.com
==References==
CleverCoin

An exchange offering trading for bitcoins against euro.
Traders add funds through SEPA, iDEAL or other methods and then place normal or limit orders to buy and sell.
CleverCoin has a trading API.
==Trading==
===Buying===
A buy order is executed partially or in full when the price bid can be matched against a sell order that is at or below the bid amount.
===Selling===
A sell order is executed partially or in full when the price asked can be matched against a buy order that is at or above the ask amount.
Fees are 0.3% for both buying and selling.
==Adding Funds==
===BTC===
Funds are available once confirmed (3 confirms). No fees.
===EUR===
The exchange accepts SEPA bank transfers for deposit.
==Withdrawing Funds==
===BTC===
For the withdrawal of bitcoins 0.0001 BTC is calculated (this is currently a standard netwerkfee of bitcoin).
===EUR===
Withdrawals as SEPA transfers. For withdrawing euro's € 0,70 is charged.
==API==
See the API page for more info.
==History==
The service was launched on September 11, 2014.
==See Also==
* Buying bitcoins
* Selling bitcoins
==External Links==
* CleverCoin EUR exchange website
==References==
Category:Defunct exchanges
Category:eWallets
de:CleverCoin
Clj-btc

clj-btc provides Clojure bindings for Bitcoin Core's JSON-RPC API.
Example use from the REPL:
user=> (require '[clj-btc.core :as btc])
nil
user=> (btc/getinfo)
{"timeoffset" 0, "protocolversion" 70001, "blocks" 111908, "errors" "",
 "testnet" true, "proxy" "", "connections" 4, "version" 80500,
 "keypoololdest" 1380388750, "paytxfee" 0E-8M,
 "difficulty" 4642.44443532M, "keypoolsize" 101, "balance" 0E-8M,
 "walletversion" 60000}
Sources can be found on GitHub.
Category:Software
Category:Clojure