Your post has many mistakes therefore my answer will focus on their clarification.
Who ordered the killing of Hamza?
First of all Hind () was not responsible for killing Hamzah ibn 'Abd al-Muttalib().
As the -former slave- Wahshy was the slave of Jubayr ibn Mut'im, who bribed him to do so as a revenge for the killing of his uncle in the battle of Badr.
the hadith you have mentioned is narrated in sahih bukhari and it is one of the most authentic works of hadith. below is a link for reference;
there is another narration in bukhari,
see : https://sunnah.com/bukhari:284
both these hadith are graded 'sahih' (authentic).
and there is one more similar hadith ...
this event is mentioned in the books of islamic history. there is a slight difference in the wordings but it's just only due to the preference of the translator i believe.
EXCERPT FROM SOURCE
Ibn Shabbah narrated with his isnad that Uthman ibn Affan entered upon a slave of his who was feeding his she-camel, and he saw something in the feed ...
The Prophet (ﷺ) said: "The people of Paradise shall enter [it] without body hair, beardless, with Kuhl on their eyes, 30 years of age or 33 years." At-Tirmidhi (2545) Graded Sahih by Sheikh Albani in Sahih al-Jam‘i (7928) and in Musnad Ahmad (8505) - Hasan - related from Abu Hurayra that there is "no doubt" about the age of 33.