I would not consider any of those clauses as ratifying slavery, so much as living with it. For example, on the whole, the free states wanted slaves to be counted for taxation purposes, but not for determining allotment of representatives. The slave states wanted the reverse. Essentially, they split the difference. The result was not to anyone’s liking, but was a compromise the constitutional convention, and then the states, could put up with. The framers, like the Congress that issued the Declaration of Independence, recognized that they weren’t going to be able to sort out slavery, and that trying would just crash the entire effort to set up the Federal Government, so they came up with an accommodation everyone could put up with.
“I would not consider any of those clauses as ratifying slavery, so much as living with it.”
When the original 13 slave states voted to ratify the constitution - all of them did - they voted to ratify everything in the constitution including protection of the slave trade until the year one thousand eight hundred and eight, the fugitive slave clause, and the three-fifths provision for calculating representation in Congress.
Yes, slavery was ratified in the United States Constitution, but not until Article I.