The blockchain is a list of all transactions that have occurred using the Bitcoin currency. DON'T USE THIS FOR THE SERVICE NAMED 'blockchain.info'!

learn more… | top users | synonyms (1)

1
vote
0answers
27 views

Legal status of Blockchain proof-of-existence TX (USA court)

Is there any real USA court cases with Bitcoin's Blockchain used as an proof-of-existence/timestamp service (without BTC transfer)? Can Bitcoin's Blockchain be used as a 'signing' utility same as ...
0
votes
3answers
43 views

I want to start mining new blockchain (exactly as Satoshi did in 2009) for testing purpose

I will mine myself ONLY so difficulty will be always in 1 range so CPU is enough for this task So my question is: how to setup bitcoin core 0.12 to start mining with CPU new blockchain ? If I type ...
1
vote
3answers
58 views

Who decides that the new block is ready to hash?

I know that new blocks are relayed one block per 10 minutes but that time is not exact but average so: Who decides that the new block is ready to hash?
0
votes
2answers
37 views

Is blockchain necessary?

I am interested in developing a crypto-currency (who isn't), but I have no interest in the blockchain mining aspect of it. I want to program one that emits the coins when someone has performed some ...
1
vote
1answer
13 views

How to apply RBF (Replace-by-Fee)

I got a stuck transaction and would like to clear this. I found many information about RBF (Replace-by-Fee) how it works etc. So i think this might be the best option to get my transaction going. ...
1
vote
1answer
22 views

Height mismatch between bitcoin-qt and bitcoin explorers

I am running bitcoin-qt on the testnet. The count of the last block is 787794 which is way ahead of what I see on blockchain explorers such as https://test.webbtc.com/, which shows the last block as ...
1
vote
1answer
51 views

Bitcoin boom and bust - Inherent instability of Bitcoin

I'd like to put the a question to the community regarding the inherent stability/instability of Bitcoin. I hope it's not off-topic since it's more a economics-type question. So, here's the scenario in ...
1
vote
0answers
16 views

Finding forks in the blockchain

I would like to analyze forks happened until now in the blockchain, is there any kind of script or suggestion to view that(not the blockchain.info chart)
0
votes
1answer
34 views

Is the merkle root random? (Crytographically secure?)

If I look at a block 000000000000000004f0cc322f551e39676f781186441614da3281bbc7d373e0 I can see the value of the merkel root: 9fe31d0d9d06d9da341a3ee757c57bb29af522796d5d9efa5efded8cda1684a4 Which ...
0
votes
1answer
15 views

How to find values of Prev_Hash and Tx_Root

http://bitcoin.stackexchange.com/a/13347/27951 Based upon the answer here, it seems there's values per block with each Prev_Hash and also Tx_Root There doesn't seem to be much documentation for how ...
0
votes
1answer
39 views

one time pad using blockchain

I am thinking if secure encryption like one time pad (OTP) is achievable using bitcoin blockchain? The reason is bitcoin blockchain size is over 70 GB, which could potentially encrypt/decrypt 70 GB ...
1
vote
1answer
40 views

What can I do with Bitcoin Core to see my current balance?

I've waited 4 days now for Bitcoin Core v0.12.0 to synchronise the network and its getting really frustrating, especially when I still have 2 years and 38 weeks worth of the blockchain to download. ...
1
vote
2answers
44 views

Empirical analysis of blockchain branches: once every 380 blocks?

I've completed an empirical analysis of blockchain forks from block #300000 thru #400000. I found the following: (a) blockchain forks of length 1: observed every 380 blocks on average; (b) blockchain ...
1
vote
1answer
63 views

What happens when an attacker completely controlls your Internet connection?

Bitcoin assumes that everybody sees the same ledger. However, what if your ISP is evil, and modifies your view of the Bitcoin network? Is it possible for such an evil ISP to make your own transactions ...
0
votes
2answers
53 views

How do I remove hard coded seeds from the bitcoin source code?

I'm experimenting with blockchains at home and in my debug logs are lots of errors showing that my nodes are trying to get addresses from the hard coded seed nodes, I know I can use connect to turn ...
1
vote
2answers
37 views

Bitcoin adress security questions

I am trying to understand Bitcoin addresses, but it does not seem to be easy at all. As far as I know, a transaction uses one or more addresses as input and one or more addresses as output. Is this ...
4
votes
2answers
89 views

Where did the idea of blockchain come from? Git was already using it since 2005

With bitcoin's blockchain, each block's hash is computed with the previous block's hash. That makes all blocks an immutable chain. This is not the first time people used a hash-chain. As far as I ...
3
votes
1answer
35 views

Where can I find records of blockchain branches?

I plan to analyze blockchain branches to satisfy my own curiosity: how often do they occur, are they increasing in frequency, etc. To clarify my earlier mistaken terminology: I am talking about ...
1
vote
1answer
35 views

Where can I find a record of blockchain soft forks?

I plan to analyze soft forks to satisfy my own curiosity: how often do they occur, are they increasing in frequency, etc. Where can I find a record of blockchain soft forks? I'd love to find a handy ...
0
votes
1answer
56 views

Blockchain.info send may transactions API v2

I'm currently using v2 of Blockchain.info's API and am wanting to utilise "Send Many Transaction" and am having some issues. I have 1 wallet with many addresses, I am trying to send 2 transactions ...
1
vote
0answers
17 views

Verification progress decreasing when validating genesis block

I've been experimenting with the litecoin source and have decided to make my own token network for personal use. I've mined my own genesis block, and assigned unique identifiers for base58Prefix and ...
0
votes
1answer
69 views

blockchain size issue

I am running full bitcoin node locally. Currently, the size of the blockchain is around 70 GB. Blockchain size Further, I stored all the blocks in a text file in json format. It turned out that the ...
2
votes
1answer
40 views

What is 'spendability of coinbase transaction after 100 blocks' in Mastering Bitcoin referring to?

Ch7 of the book writes at the end of the Introduction section: "After 100 blocks back there is so much stability that the coinbase transaction—the transaction containing newly mined bitcoins—can ...
0
votes
1answer
27 views

When I pay, how is my balance checked, if I use different address every time?

I know there are quite similar questions, but none have addressed my issue. Let's say I use Electrum wallet, that generates addresses & keypairs from seed. So for every next transaction I use ...
2
votes
0answers
31 views

Bitcoin / blockchain security proof

Has there been any research papers where someone has completed a full security proof model on blockchain / bitcoin ?
1
vote
1answer
45 views

Blockchain research

I am doing research on block chain malleability and I want to build my own blockchain prototype / testbed in order to practically see the malleability issues in blockchaining mechanism (like bitcoin). ...
1
vote
0answers
79 views

Simple version of blockchain? Blockchain for training

Please tell me whether there is a simple/lighter version of blockchain, you can install and learn "at home"? Link? Which implementation blockchain better learning?
0
votes
1answer
51 views

Server requirements & optimal configuration for Testnet

My friend and I are interested in running some experiments using a blockchain and accordingly we're interested in setting up our own Testnet. We're a bit light on experience, i.e. we've never set up ...
0
votes
1answer
74 views

Bitcoin gone with “this transaction is not yet conformed”

I sent my bitcoins from my multibit wallet, first I did a a test spend which came across and then I sent all my coins. The transaction got a triangle icon and the text "this transaction is not yet ...
0
votes
1answer
38 views

How to determine the last 1k blocks and their Miner Software?

Basically the idea was to create a tiny service such as nodecounter.com. Now I would appreciate your help on the following questions: How to determine the Software (Core, Classic, XT, etc.) and ...
0
votes
2answers
55 views

Building a web app to collect Bitcoin payments. How should I monitor transactions on payment?

I'm looking to create a web app similar to coffee.foldapp.com where they load up a bitcoin address and once you pay it will automatically show the Digital code product. They seem to be using ...
0
votes
0answers
29 views

How can I automate bitcoin sending?

I need a wallet which supports the ability to send payments to other wallets through some sort of rest API / URL's, anyone got any info? Thanks!
2
votes
1answer
161 views

Why change the nonce instead of just rehashing?

Why do miners increase the nonce to compute a block hash rather than just generating a random block hash? It seems to me that both approaches would have the same likeliness of finding a result that ...
1
vote
1answer
31 views

Other server wallets than bitcoind recommended for a ubuntu server

I currently run bitcoind on my server that is hosting an online browser game where bitcoin is integrated. The problem I have right now is that we are running out of diskspace with the increasing size ...
1
vote
3answers
324 views

Why does the “global lottery” prove the validity of the blockchain?

As far as I understand it currently, when winning the "lottery" (mining) you can add a block, sum of transactions, to the blockchain. This block is in the first instance verified by all network users. ...
4
votes
3answers
146 views

Has the bitcoin network ever been “down”?

I'd be interested to know if the bitcoin network has ever been down. By "down" I mean that a client would not be able to synchronize with the network to obtain data like the txs in the mempool or ...
2
votes
3answers
78 views

What makes a trusted source trusted?

I know that the blockchain technologie works so well, because everybody has basically a copy of the last ledger. Therefore, if a transaction happens, everybody inside the network has to "approve" the ...
1
vote
2answers
75 views

What makes blockchain technology so attractive to non cryptocurrency applications?

I have often seen articles claiming bitcoin's demise is iminent but yet others state the blockchain technology that powers it is being considered for other uses. What features make it attractive for ...
0
votes
0answers
30 views

Received Error “You cannot sign a non-build transaction error” when trying to send BTC in Blockchain Wallet

has anymore received the error : "You cannot sign a non-build transaction error" when trying to send BTC. I have 7 pending transactions running for 24 hours now, and when I tried to make an 8th ...
2
votes
2answers
275 views

Is there actual consensus on the blockchain's tip or only until the next block?

Using this scenario http://bitcoin.stackexchange.com/a/40435 Let's say we have two competing blockchain tips: They both start from Block A as a parent, but then there are two different blocks ...
6
votes
2answers
234 views

What are the key differences between factom and tieron?

At a headline level, both Factom and Tieron appear to offer an identical service: ability to use the bitcoin blockchain to publish proofs of existence in a scalable way (i.e. by multiplexing multiple ...
0
votes
1answer
58 views

How would an atomic exchange of assets be implemented in a blockchain?

There are non-Bitcoin blockchains being created at the moment that are used to trade and transfer assets. It is my understanding that on such a block chain there are "tokens" representing assets such ...
1
vote
1answer
32 views

Security within a deleting blockchain model

Assume a blockchain model that contained no transaction data - just pure data. After a set time this data would simply be deleted, and entire blocks would be removed. How would the security model of ...
1
vote
2answers
101 views

Who is the certification authority in Bitcoin?

If you would compare Bitcoin with electronic banking there are quite a lot of similarities like the encryption and hashing with private and public keys. In electronic banking though the bank is the ...
0
votes
1answer
47 views

storing bitcoin's database directory on an external drive?

I have a new-ish powerful laptop with SSD, limited to 128GB. It came with a RAID which somehow didn't work for installing linux, so I had to disable the RAID and now I have actually two 64GB disks ...
0
votes
0answers
17 views

What blockchain (or similar technologies) allow for “splitting” the network, offline?

There were a few ideas on how to make the blockchain hierarchical, and also splitting it to allow for splits. Are there any proposed/non implemented ideas that accomplish this with Bitcoin or any ...
1
vote
1answer
88 views

Bitcoin core stopped sync'ing (without downloading all the data). How can I make it resume the synchronization?

I really need your expertise guys. I am extremely new to this concept but just decided to try. Unfortunately I did not do my homework before playing with my money. I bought some coins and I sent them ...
1
vote
2answers
192 views

Can a hard fork effectively double the value held in bitcoin?

A hard fork necessarily means that two versions of the block-chain exist and value is held in both. Now realistically one of them should probably go down in value and the other increase or hold steady ...
1
vote
1answer
200 views

How long do files stay on the Decentralized Data Storage blockchain when using NXT's Data Cloud Feature?

NXT 1.7.4 just released a new Data Cloud feature: How long do files last on the NXT blockchain?
1
vote
0answers
36 views

writing blockchain explorer, handling sidechains and block reorg

I've got stuck with problem how to handle sidechains. E.g. we are on the longest chain, all transactions have been parsed (we mark outputs as spent, manage addresses total receive, total spent), we ...