{"ok":true,"algorithm":"ed25519","publicKey":"MCowBQYDK2VwAyEAtfUsCOyl2eKoGyOUnbYbC2UsSY5pz6ggSmhjYcSDRw8","publicKeyRawHex":"b5f52c08eca5d9e2a81b23949db61b0b652c498e69cfa8204a686361c483470f","fingerprint":"d1eb58ef69fc134c52bf548ec6d9705af2759359e0c551d085e7cdc68bbc5771","fingerprintSpec":"SHA-256 over the raw 32-byte Ed25519 public key, hex — pin it independently of this endpoint","keyMode":"persistent","previousKeys":[],"canonicalization":"JSON, keys sorted lexicographically, no whitespace (canonicalJson)","usage":"POST { payload, signature } — signature is base64url Ed25519 over canonicalJson(payload)."}