The owner of a bitcoin transfers it by digitally signing it over to the next owner using a bitcoin transaction, much like endorsing a traditional bank check. A payee can examine each previous transaction to verify the chain of ownership. Pool de mineração bitcoin scrypt.
A bitcoin is defined by a sequence of digitally signed transactions that began with the bitcoin' s creation, as a block reward. The calculations are based on the current pool fee 0% bad shares , doesn' t account for orphan blocks uncles.