[1][2] The chain was formed by approximately 6 to 7 million people and extended for a distance of 700 kilometres (435 miles) stretching north to south from Kasaragod to Kaliyikkavila.

[5] The chain was completed at 16:00 Indian Standard Time (+5:30 GMT) when the participants read out the preamble of the Constitution of India and swore an oath to protect it.

The act grants Indian citizenship to Hindus, Sikhs, Buddhists, Jains, Parsis and Christians who claim to be from Pakistan, Bangladesh or Afghanistan and reduces the period of naturalization.

[11] The NRC was criticized for being deeply flawed and acting on the basis of guilt until proven innocent thereby providing the possibility of genuine citizens being rendered stateless by the process.

[12][13] The passage of the CAA led to widespread protests across India, leading to at least 25 dead with the ruling Hindu nationalist Bharatiya Janata Party being accused of religious discrimination in providing citizenship, violent suppression of dissent and attempting to disenfranchise and segregate millions of Muslims with the continued insistence on implementing a nationwide NRC.

[28] The opposition United Democratic Front however provided no clear indication of support while the LDF was able to disseminate the message that the chain was not to be linked to any electoral interests other than the protection of the constitution and the secular fabric of the country.

[6][30] The human chain was organised with the help of transportation provided by the Left Democratic Front to connect the less populated parts along national highways.

At 16:00 Indian Standard Time (4:00 PM), the chain was formally formed when the participants read out the preamble to the Constitution of India and then took the pledge.

[35] Chief Minister, Pinarayi Vijayan and Communist Party of India state secretary, Kanam Rajendran joined the chain in the capital of Kerala, Thiruvananthapuram at Martyr's square, Palayam.