Today I am uploading from a contemporary source,Sand brought safely to Nanaki Chakk (Anandpur Sahib), which was received by the Tenth Master and embraced Bhai Jaita and blessed him with the honorific of GURU ka BETA: Son of the Holy Preceptor.  

Bhai Jaita served Guru Gobind Singh in his Army and was baptised with the name Jivan Singh.  Bhai Jaita attained martyrdom in the battle of Chamkaur on December 6, 1705CE.  So it is clear that this document was prepared after Creation of the Khalsa in 1699 CE as it mentions the Baptism Ceremony (Panj Kakari Rehit) and before 1705CE  i.e.before his martyrdom.  The Six Posts from this contemporary source, prepared during the life times of Guru Gobind Singh establishes to the hilt that:

1. Panj Kakari Rehit was introduced by Guru Gobind Singh ji for Creating Akal Purakh ki Fauj: KHALSA.
2. For preparing the Khande di Pahul Five Banis:
   1. Japuji Sahib,
   2. Anandu Sahib (from Guru Granth Sahib) and
   3. Japu Sahib,
   4. Sawayie,
   5. Kabio Bach Benti Chaupai (from Dasam Granth Sahib)

were recited since 1699CE.

Bhai Jaita was equally influenced by both the Scriptures of the Guru Panth: Guru Granth Sahib and Dasam Granth Sahib,and it is visible in his historic composition, quoted in this post