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Short version: Is there a way to sign a transaction on an offline-computer using only official or widely trusted tools?. Long version of this question: There are several posts on how to do that but all of them link to more or less experimental tools.

When syncing after a period of being offline, a transaction that the wallet received during the offline period was seen in a block, and the transactions tab in the QT ui showed the transaction. However the transactions was not shown as ".

Bitcoin includes a multi-signature feature that allows a transaction to require multiple independent approvals to be spent. This can be used by an organization to give its members access to its treasury while only allowing a withdrawal if 3 of 5 members sign the transaction. Some web wallets also provide multi-signature wallets, allowing the user to keep control over their money while.

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28/10/2015  · When you start Bitcoin Core it will take a long time to synchronize with the Bitcoin network because the software has to download the entire blockchain, which contains over five years of global transaction history. Once you are synced the program will know the balance of every bitcoin address in existence and can verify when you send or receive bitcoins in real time.

Watch Bitcoin address is a way for you to check your cold storage balance online without exposing your private key. Create an wallet account at https://blockchain.info/wallet/ Go to import/export. At "Add Watch Only Bitcoin Address", add your bitcoin address. Wait for the balance to synch.

Tyring to run a local Bitcoin test node, on mainnet configuration (need the real addresses structure), transaction sent and is listed in my local mempool, but is not entering the next blocks. Impo.