Block header

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Advanced Programming^[1]

An 80-byte header belonging to a single block which is hashed repeatedly to create proof of work.^[2]

I could try to explain it better than this web site, but I really couldn't do a better job than him.

If on the off chance his site isn't available, I have a PDF of this particular page. Please click here to see the PDF.

References[edit]

[1] ttp://www.flaticon.com/

[2] ttps://bitcoin.org/en/glossary/block-header

[1]

[2]