both are useful
the block hash proves knowledge of some information that couldn't have been available before (same as using a newspaper headline, for example), so it puts a >= bound on the timestamp
OTS stamping can be used to prove that information already existed at a certain time (by putting it in a merkle tree that will be published in a block), so puts a <= bound on the timestamp
together these can "box in" the timestamp of the event
laanwj
npub1p2…crnl6
2024-09-21 10:11:10
in reply to nevent1q…egx4
Author Public Key
npub1p23eukh0nxsqpfaakz6fj9vvj27y4gs0kevnrffdq4d4adkl7uuq7crnl6Published at
2024-09-21 10:11:10Event JSON
{
"id": "198c53abfb701cf0b80fe078493ba8507eab621abacd17560b6617f3b996c6d5",
"pubkey": "0aa39e5aef99a000a7bdb0b499158c92bc4aa20fb65931a52d055b5eb6dff738",
"created_at": 1726906270,
"kind": 1,
"tags": [
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[
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[
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"31990:266815e0c9210dfa324c6cba3573b14bee49da4209a9456f9484e5106cd408a5:1686066542546"
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],
"content": "both are useful\n\nthe block hash proves knowledge of some information that couldn't have been available before (same as using a newspaper headline, for example), so it puts a \u003e= bound on the timestamp\n\nOTS stamping can be used to prove that information already existed at a certain time (by putting it in a merkle tree that will be published in a block), so puts a \u003c= bound on the timestamp\n\ntogether these can \"box in\" the timestamp of the event",
"sig": "62d3336dc2e04af0eae2cf2706b5f14eaebba22402ffd24baa9ba23a8c50cc5051d497c2b20bb30fddfafe6d31b399fd1d68da4f04af487ab168d6d72edba6e1"
}