I also had a similar question sometime back, so this thread[1] might also be worth looking in to for any one looking for further answers. Some members there gave some excellent responses.
1. What is with these Bitcoin blocks?
Topic: Possible bug on the bitcoin blockchain? Weird - please explain (Read 106 times)
Ok, I see, many thanks for the explanation. Does make sense, regards, Louis
See: https://en.bitcoin.it/wiki/Block_timestamp
Timestamps only need to satisfy the following:
"A timestamp is accepted as valid if it is greater than the median timestamp of previous 11 blocks, and less than the network-adjusted time + 2 hours. "Network-adjusted time" is the median of the timestamps returned by all nodes connected to you. As a result block timestamps are not exactly accurate, and they do not need to be. Block times are accurate only to within an hour or two."
Timestamps only need to satisfy the following:
"A timestamp is accepted as valid if it is greater than the median timestamp of previous 11 blocks, and less than the network-adjusted time + 2 hours. "Network-adjusted time" is the median of the timestamps returned by all nodes connected to you. As a result block timestamps are not exactly accurate, and they do not need to be. Block times are accurate only to within an hour or two."
I just don't get it, maybe I don't understand the blockchain correctly, how can block 839972 and block 839973 have a time earlier than block 839971? Thanks, if someone could explain, best, Louis
Code:
bitcoin@bitcoin:~$ for block in {839968..839975}; do echo $block: $(bitcoin-cli getblock $(bitcoin-cli getblockhash $block) 2 | ./jq ".time"); done
839968: 1713555843
839969: 1713556158
839970: 1713556364
839971: 1713558153
839972: 1713558054
839973: 1713558091
839974: 1713558976
839975: 1713559220
bitcoin@bitcoin:~$
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