The protocol doesn't support multiple signatures. That would create an invalid event.
Here is a howto for the musig2 scheme https://github.com/fiatjaf/nak/blob/a6509909d0d83405a5be57fbc1831f6bb96b316e/README.md?plain=1#L91
arkinox
npub1ar…rh43w
2025-06-09 17:21:22 UTC
in reply to nevent1q…ykuz
Author Public Key
npub1arkn0xxxll4llgy9qxkrncn3vc4l69s0dz8ef3zadykcwe7ax3dqrrh43wSeen on
wss://nostr.winePublished at
2025-06-09 17:21:22 UTCEvent JSON
{
"id": "1968c2d433ee8f1e49a2c9364eeb09a302019d026e26d817c1032cc3176eff3d",
"pubkey": "e8ed3798c6ffebffa08501ac39e271662bfd160f688f94c45d692d8767dd345a",
"created_at": 1749489682,
"kind": 1,
"tags": [
[
"e",
"0c78c8e302c5b36fd2c9a501024aefe9f5c366dda138db8a26147f0418e071b6",
"wss://relay.primal.net",
"root"
],
[
"e",
"72307dd7206b56d359b053fbcc3b402f786a822e881ea16892e5bd641595e11b",
"wss://relay.primal.net",
"reply"
],
[
"p",
"e8ed3798c6ffebffa08501ac39e271662bfd160f688f94c45d692d8767dd345a",
"",
"mention"
],
[
"p",
"3bf0c63fcb93463407af97a5e5ee64fa883d107ef9e558472c4eb9aaaefa459d",
"",
"mention"
],
[
"p",
"da18e9860040f3bf493876fc16b1a912ae5a6f6fa8d5159c3de2b8233a0d9851"
],
[
"r",
"wss://cyberspace.nostr1.com/",
"write"
],
[
"r",
"wss://fanfares.nostr1.com/",
"write"
],
[
"r",
"wss://filter.nostr.wine/",
"read"
],
[
"r",
"wss://nostr.wine/",
"write"
],
[
"r",
"wss://nostrelites.org/"
],
[
"r",
"wss://relay.damus.io/"
]
],
"content": "The protocol doesn't support multiple signatures. That would create an invalid event.\n\nHere is a howto for the musig2 scheme https://github.com/fiatjaf/nak/blob/a6509909d0d83405a5be57fbc1831f6bb96b316e/README.md?plain=1#L91",
"sig": "805eb3fa4b15dfd9b3ad4a3acfb813f18b34346fbdb8c707bfa836226dc0ef7d21dad74cbc063b421b7b26be00e117a86624f32ff7e09bd047a5e8f14d75c4d4"
}