The Native title in our national territory
The Original Certificate of Title No. T-01-4
is intact in the Treaty of Paris instruments

As emphasized In the 1987 Constitution textbook (look at arrow), the Philippine Archipelago referred to in the 1987 Constitution Article 1 is the one mentioned in the 1935 Constitution Article 1.

In the 1935 Constitution, there is an Entitlement stating that the limits of the Republic of the Philippines, established by the United States since 1898, exercising jurisdiction in the Philippine Territory are set forth in Article 3 of the Treaty of Paris.

Also specified in the 1973 Constitution that there really is a Historic or Legal Title for our National Territory in Article 1 but later removed this very sensitive information in the 1987 Constitution. Why?

The Philippine Archipelago referred to in Article 1 of the 1987 Constitution is the one mentioned in the 1935 Constitution Article 1.