npub10c35n4zf89n8cq7u4cs30gxdu9e02je83uuf3kmwxlnxm05tzugqmg4fqd (npub10c3…4fqd)
Short answer: someone else can use the username on another instance but not on your instance.
Longer answer:
Your unique address is the combination of a username on a particular instance:
@ (username) @ (instance)
It's the same with email addresses, if you register JohnSmith on Gmail that doesn't mean you are JohnSmith on Yahoo Mail.
It works like this because there's no central service keeping track of everyone. Each server is totally independent.
Fedi.Tips /
npub1jm…m8ccv
2023-07-26 09:51:06
in reply to nevent1q…x8yk
Author Public Key
npub1jm8mqhfhanqj03aer6r5nl9rvgrj7uz8fgas3lu7fkk4g0adyqtskm8ccvPublished at
2023-07-26 09:51:06Event JSON
{
"id": "92cae844f3e64ca19653a06fa58082bb07e2b1bd5320f0f87f7b61107ce9a9ad",
"pubkey": "96cfb05d37ecc127c7b91e8749fca362072f70474a3b08ff9e4dad543fad2017",
"created_at": 1690365066,
"kind": 1,
"tags": [
[
"p",
"7e2349d44939667c03dcae2117a0cde172f54b278f3898db6e37e66dbe8b1710",
"wss://relay.mostr.pub"
],
[
"p",
"a728b428096644217bb4a126c8ef504d2726ed6cc44bae303161d49debdccbb0",
"wss://relay.mostr.pub"
],
[
"e",
"ef53b260bbf2f1d0a01913d63dfed2baff66f99717620f8e5a82e9cb1f41105c",
"wss://relay.mostr.pub",
"reply"
],
[
"mostr",
"https://mstdn.social/users/feditips/statuses/110779764967872049"
]
],
"content": "nostr:npub10c35n4zf89n8cq7u4cs30gxdu9e02je83uuf3kmwxlnxm05tzugqmg4fqd \n\nShort answer: someone else can use the username on another instance but not on your instance.\n\nLonger answer:\n\nYour unique address is the combination of a username on a particular instance:\n\n@ (username) @ (instance)\n\nIt's the same with email addresses, if you register JohnSmith on Gmail that doesn't mean you are JohnSmith on Yahoo Mail.\n\nIt works like this because there's no central service keeping track of everyone. Each server is totally independent.",
"sig": "10bc7265fcf07e142c17f0d9be5ffa561f1067fe4c8ab93cd4fb2a591bf395042cf00de7890469067300473492567803cf08766d709d15a9c78a3bf43fd8f1f9"
}