Feedback highly appreciated.
https://youtu.be/SzdD2wrArJs
bitcoin does not use adam backs hashcash
bitcoin POW was INSPIRED by it slightly, it but does not use it
bitcoin was inspired by many many techniques of the past.. all adapted, modified and then woven together into what made bitcoin. but not in the same way the original inspirations used them
hashcash does not use sha256 and hashcash doesnt have the same 'difficulty mechanisms'
and hashcash was more about hashing an email address not actually about cash(currency)
.. the way i read your mention of hashcash is like saying
"Tesla cars in 2023 use medievel wheelbarow wheels"
which is incorrect.
"telsa use wheels(modern alloys with rubber tyres) which if you follow the history of wheels can be seen as passing through the middle ages back to wheelbarrows and carts wheels (wood)" but that does not mean a tesla car drives on wheelbarrow wheels
hashcash is an example of "proof of work" of which "proof of work" is not a hashcash invention .. proof of work was invented before adamback..
satoshi first learned about proof of work by seeing hashcashs example of.. and got inspired and then adapted to his own needs.. basically its like highlighting a teacher. not an inventor or co worker