Al-Haythami said in al-Majmaʿ (10/41):

“Al-Bazzar and al-Tabarani narrated it in al-Kabir and al-Awsat, and their chains of transmission are good.”

This wording misleadingly suggests something contrary to the facts. For, as you have learned from the statements of al-Bazzar and al-Tabarani, it has only this one chain of transmission. By “chains,” he merely meant the routes from al-Harithi that were mentioned above. Take note.

I then found that al-Hafiz had preceded me in deeming it good, saying in Mukhtasar Zawaʾid al-Bazzar (2/377):

“Its chain of transmission is good.”

3136 — “The first thing Allah, Blessed and Exalted is He, created was the Pen. He took it in His right hand—and both His hands are right—and it wrote down the world and all that would occur therein: every deed performed, whether righteous or wicked, and everything fresh or dry. It was then fully recorded with Him in the Record. Then He said: ‘Read, if you wish: “This Our record speaks against you in truth. Indeed, We have been recording all that you did.”’ For can a copy be made except from something already completed?”

It was narrated by al-Ajurri in al-Shariʿah (321–322), who said: Abu Muhammad ʿAbd Allah ibn Salih al-Bukhari informed us; al-Hasan ibn ʿAli al-Hulwani narrated to us; Abu Tawbah al-Rabiʿ ibn Nafiʿ narrated to us from Baqiyyah ibn al-Walid, who said: Artaʾah ibn al-Mundhir narrated to us from Mujahid, from Ibn ʿUmar, that the Messenger of Allah ﷺ said ... and he cited it.

I say: This is an authentic chain of transmission. Its narrators are trustworthy and have biographies in al-Tahdhib, apart from Abu Muhammad al-Bukhari. Al-Khatib wrote his biography (9/481–482) and related from more than one hadith authority that he was reliable. Al-Dhahabi described him in al-Siyar (14/243) as “the truthful imam.”