for testing purposes of bitcoin....
just grab the source code, compile it and only select connections from IP addresses in your private group. this will start off a new chain from block 0 if the other nodes in your private network do not have the 7 years of blockdata.
if you want to start with the 7 years of bitcoins blockchain data be aware. you are automatically hit by the difficulty that comes with it. so trying to create new blocks ontop of the 7 years data privately will take alot of hashing power/time.
if you however start to change the code and mess with things, or create new blocks its no longer "bitcoin code" and would be rejected if you tried to open your private network to the public. in actual fact your new blocks would get rejected and your nodes would simply grab the real bitcoin blocks.. well if your concensus rules have not changed too much to invalidate real bitcoin data.
for testing purposes of new features
just grab the source code tweak it to add new features, compile it and only select connections from IP addresses in your private group. this will start off a new chain from block 0 with 0 difficulty.
Topic: Can I create a private Bitcoin blockchain? - page 2. (Read 2009 times)
Now I wonder if I would be able to use any Bitcoin miner to mine the forked alt coin from BTC?
You're designing your own alt - it is entirely up to you whether you want to make it compatible with double-SHA256 and Bitcoin miners.
I thought that it might work this way since I would be using the same hashing algorithm as Bitcoin but in my very own alt coin. If I decide to make an alt coin, I would choose to fork it from BTC and make another altcoin forked from ETH but this last one will be a private blockchain in which, it will operate more as a secret alt coin. Then, the only way to buy that coin would be via a decentralized marketplace with the use of anon coins. Just my thoughts.
Now I wonder if I would be able to use any Bitcoin miner to mine the forked alt coin from BTC?
You're designing your own alt - it is entirely up to you whether you want to make it compatible with double-SHA256 and Bitcoin miners.
Is it possible to make your own private blockchain within Bitcoin itself? (separate chain) I know that I can do this with Ethereum, but for Bitcoin it has taken me quite some time to figure it out. The private chain would be more like a separate chain to make BTC transactions out of its main chain and test certain capabilities of it. If this can be accomplished with Bitcoin, then it would be great.
Check out "side chains". That might be what you are looking for. Here is an explanation: https://www.cryptocoinsnews.com/simple-explanation-awesomeness-bitcoin-sidechains/
If you want to create your own private blockchain then a better option is simply creation of an altcoin. You can't add your own chain to the bitcoin network.
I mean to can try, but NODES ALWAYS CONSIDER THE LONGEST CHAIN TO BE THE CORRECT ONE, so your chain will be ignored instantly.
I mean to can try, but NODES ALWAYS CONSIDER THE LONGEST CHAIN TO BE THE CORRECT ONE, so your chain will be ignored instantly.
Thanks for the your advice guys. Although I would be able to test this out with testnet, I just had the idea of creating my own separate chain for Bitcoin. However, I would prefer to make my own altcoin forked from Bitcoin to test out certain capabilities like making the genesis block, etc. Sidechains look pretty convenient, so I might give it a try as well.
Now I wonder if I would be able to use any Bitcoin miner to mine the forked alt coin from BTC?
Is it possible to make your own private blockchain within Bitcoin itself? (separate chain) I know that I can do this with Ethereum, but for Bitcoin it has taken me quite some time to figure it out. The private chain would be more like a separate chain to make BTC transactions out of its main chain and test certain capabilities of it. If this can be accomplished with Bitcoin, then it would be great.
Check out "side chains". That might be what you are looking for. Here is an explanation: https://www.cryptocoinsnews.com/simple-explanation-awesomeness-bitcoin-sidechains/
If you want to create your own private blockchain then a better option is simply creation of an altcoin. You can't add your own chain to the bitcoin network.
I mean to can try, but NODES ALWAYS CONSIDER THE LONGEST CHAIN TO BE THE CORRECT ONE, so your chain will be ignored instantly.
I mean to can try, but NODES ALWAYS CONSIDER THE LONGEST CHAIN TO BE THE CORRECT ONE, so your chain will be ignored instantly.
Is it possible to make your own private blockchain within Bitcoin itself?
No, not possible.
The private chain would be more like a separate chain to make BTC transactions out of its main chain and test certain capabilities of it. If this can be accomplished with Bitcoin, then it would be great.
You can make tests on the testnet.
If you want a separate, private blockchain, you can create an altcoin.
You can but it will be not like in side chain or main chain of bitcoin but in your own mainchain. You have to fork the current bitcoin source code and run few nodes on your several computer or any number of computers. And after that you can test whatever you want.
i also wondering about private key,do you kow how to create own private key?did it create on blockchain or with another application?i think would be great if we have unique private key
You can but it will be not like in side chain or main chain of bitcoin but in your own mainchain. You have to fork the current bitcoin source code and run few nodes on your several computer or any number of computers. And after that you can test whatever you want.
You can thats the whole point, it is open source. some of the early blockchains just took the code from bitcoin and changed a few things and away they went. you will prob not convince anyone else to mine it of run nodes now unless you have a really unique product and you also need to beware, just changing numbers and stuff wont work as the crypto, 42 showed, theres now more than 42 .... 
legendary
Activity: 1680
Merit: 1010
Professional Native Greek Translator (2000+ done)
i think you can but you will be on your own 
Is it possible to make your own private blockchain within Bitcoin itself? (separate chain) I know that I can do this with Ethereum, but for Bitcoin it has taken me quite some time to figure it out. The private chain would be more like a separate chain to make BTC transactions out of its main chain and test certain capabilities of it. If this can be accomplished with Bitcoin, then it would be great.
Jump to: