biyn.org is built almost entirely on the King James Bible text itself, which is in the public domain. A handful of features on the Bible pages, though, draw on outside data and services to go beyond plain text — audio readings, Strong's numbers, word studies, and cross-references. This page names where each of those comes from.
The KJV (1611) is in the public domain worldwide. The text used throughout this site's Bible section is this public-domain text; see Why we use the King James Version for why it was chosen over a modern, copyrighted translation.
The spoken-word audio in the Bible section's Hear tab streams directly from BibleStudyTools.com (Salem Web Network). biyn.org does not host or redistribute these recordings — the player links to their servers, so playback depends on their site being available. The KJV text is public domain, but a spoken recording of it is a separate, separately copyrighted work.
The word-by-word Strong's numbers used in Dwell mode's "Word study" toggle and the reverse concordance come from CrossWire's KJV2003/KJV2006 project (crosswire.org), which hand-aligned every word of the King James text to its underlying Hebrew or Greek word and Strong's number. This is the same alignment most Bible study software and websites ultimately rely on for this feature.
The plain-English glosses and part-of-speech explanations shown alongside a word's Strong's number come from STEPBible-Data, produced by Tyndale House, Cambridge. Specifically:
Data generously made available by STEPBible.org (Tyndale House, Cambridge), licensed under CC BY 4.0.
The "Cross references" panel in Dwell mode, which shows other passages connected to the verse you're reading, uses the cross-reference dataset from openbible.info, drawn primarily from the public-domain Treasury of Scripture Knowledge along with openbible.info's own crowd-sourced ratings of how strong each connection is. Licensed under CC BY.