Thanks @Ankit.K.Tiwari.
Some hash values for a sample of invoices:
Z83clqG+jut7z/qb+KcggkLh4MaqHf4Iuo+IOhHiO4E=
gnNmVqpllWjBQ8Y7m+kOLkZ7qi8aY/ykyohmOT9Xd9Q=
hNRDejR4tYB9awomgr1pfREfIFzfzKTf+Y8t9ImKBGg=
iEchDlat5JZH+gG7jnXzDtEeUmxbTfQOTG87RU06Qts=
X1/oGFU8mZxnJfVuCGxnR0zwIlkP5Vr+QvG9P+Qpbe4=
They all belong to different taxpayers, and all standard tax.
By the way also, the compliance endpoint is not working for more than 2 hours, always status code = 401