Dataset license: CC0 1.0 Universal (Public Domain)

Source: CRM Sales Opportunities on Google Sheets, published on Kaggle by nilkamalsaha.
https://www.kaggle.com/datasets/nilkamalsaha/crm-sales-opportunities-on-google-sheets
Dataset version 1, retrieved September 20, 2026.

The Kaggle dataset metadata identifies the license as "CC0: Public Domain".
Maven Analytics also identifies the CRM Sales Opportunities dataset as Public Domain:
https://mavenanalytics.io/data-playground/crm-sales-opportunities

Official CC0 legal code:
https://creativecommons.org/publicdomain/zero/1.0/legalcode

CC0 permits copying, modification and redistribution, including commercial use,
without requiring permission. Trademark, privacy and other rights are not waived
by this notice, and no warranty or endorsement is implied. Consult the legal code
for the controlling terms. This notice records the source's license; it does not
relicense unrelated repository files or claim ownership of the source data.

The cleaned CSVs and derived data retain their source attribution and CC0 notice.
Preserved raw files can be verified with the hashes in source.json.
