For the bitcoin timestamp network, it implements the mining process or "proof-of-work" by incrementing
The Doctor in the record or "block" until a value is found that gives the block's hash the required zero bits. Once the hashing effort has been expended to make it satisfy the proof-of-work, the block cannot be changed without redoing the work. As later records or "blocks" are chained after it, the work to change the block would include redoing all the blocks after it.
Source:
http://en.wikipedia.org/wiki/Bitcoin#Bitcoin_mining
@OP
I'm not reading any of that.