The University Of Santo Tomas (UST) has the biggest collection of extant ancient baybayin scripts in the world, according to Christopher Miller, a Canadian linguistics scholar who has been studying the ancient Philippine syllabary at the UST Archives and UST Heritage Library.
Active Baybayin community member, Christopher Miller is promenantly featured in the Inquirer article quoting:
Miller said he had also discovered that baybayin had formal usage among the locals, and between them and the colonizers. He saw in the archives land deeds, petitions, testimonies and legal proceedings written in the old script.
I hope to see the archive documents in person when I visit Manila this year.
Check it out