{"keys":[{"kty":"OKP","crv":"Ed25519","x":"SuVvtY28TE9WHMZuEw1IGtv_BT9cCVWWl95ANnrgwSg","kid":"povv-ledger-2026-06","alg":"EdDSA","use":"sig"}],"povv":{"status":"active","signer":"env","algorithm":"Ed25519","key_id":"povv-ledger-2026-06","public_key_pem":"-----BEGIN PUBLIC KEY-----\nMCowBQYDK2VwAyEASuVvtY28TE9WHMZuEw1IGtv/BT9cCVWWl95ANnrgwSg=\n-----END PUBLIC KEY-----\n","usage":"Verify audit seals: signature = base64(Ed25519_sign(privkey, hex_decode(integrity_hash)))."}}