database writes need to be verified in an integration test? - testing

Question

I basically have an api that writes to 2 different tables, and am using supertest to make api calls to write a certain data to the database e.g. POST /userCertificates writes his address in the address table, education in status table like so:
I basically do this as one of the integration tests:
payload = {user_id: 1, name: abc, address: {a: x, b: y}, education: {a: x, b: y} ...}
it('Post to the database'), ()=>{
request.post(/userCertificate).send(payload).expect(200)
.then(res =>
expect(payload.userAddress).toEqual(res.body.userAddress)
// more expects to verify the response received)
}
The /userCertificates api basically does this:
creates a new user with name and user_id
saves data of address to the address table and establishes FK relation.
saves data of education to the education table and establishes FK
relation.
But, the real confusion is, do I also need to use a dao layer that directly talks with the database to absolutely verify that the data has been written to the 2 tables? E.g.
for my case above(in the same describe block):
NOTE: user_id is a foreign key in the address and education table
it('Verify data written to the address table', ()=> {
const data = AddressDao.find({user_id: 1})
if(data.length <= 0) {
throw 'Data not written to the database
}
}
it('Verify data written to the education table', ()=> {
const data = EducationDao.find({user_id: 1})
if(data.length <= 0) {
throw 'Data not written to the database
}
}
But, not just in the case of writing to multiple tables, is such verification of data
written to the database required?