Coinbase the company is unrelated to the Bitcoin protocol, other then that they use it like everybody else.
The hash covers the Bitcoin block header. The header includes a Merkle Tree Hash of all transaction, including the transaction that is the base for creating new coins = coinbase.
You pay to public keys. Payments have to be signed by the private key holder for the public key that a given set of coins have been assigned to.
Publishing the block itself that you mined is how your announce it. Others then have to accept your block and continue building on it as a part of the blockchain.
The hash covers the Bitcoin block header. The header includes a Merkle Tree Hash of all transaction, including the transaction that is the base for creating new coins = coinbase.
You pay to public keys. Payments have to be signed by the private key holder for the public key that a given set of coins have been assigned to.
Publishing the block itself that you mined is how your announce it. Others then have to accept your block and continue building on it as a part of the blockchain.