Blockchain where do i get signature

I understand that SegWit makes transaction blockdata smaller, by not storing the signature in the Block, so that can fit more transactions in 1MB. This is because the signature is not anymore stored in the blockchain. The Signature makes nearly 70% of the data weight of the Block. So in a SegWit transaction it is 70% less stored in the Blockchain.

Blockchain adds the greatest value in the “proof-of-work” concept – transactions cannot be edited or removed, which greatly secures transactions and signature technologies. Where blockchain can benefit greatly is by the use of secure, private keys in …

Blockchain.com is the most popular place to securely buy, store, and trade Bitcoin, Ethereum, and other top cryptocurrencies.

The normal blockchain.com API is not suitable for this use case. You do not have a fine enough control over the transaction content, which is needed to embed the document hashes. I recommend you use a library like python-bitcoinlib or bitcoinlib-js to create the transaction, and use RPC to a node, to interact with the blockchain. 

To log into your wallet you need your Wallet ID, your password, and any two-factor authentication that you have enabled. Your Wallet ID is a string of random letters and numbers that acts as a …

Validate the Signature/ Hash-address combination with the public-key. So, “How do I prove a Blockchain transaction is mine?” > Instead of an user id you get control via keys and signatures, signing transaction-addresses and with that you can prove it is yours.