What it is.
Every Tuu Verified certificate is registered on Blockmark, an independent blockchain registry. The verification itself is performed by Tuu under HLB Thailand’s supervision. Blockmark is the registry that records the result — publicly, permanently, and in a form that cannot be backdated or quietly altered.
Why this matters.
Most “verified” badges in the market are PDFs hosted on a property’s own website. They can be edited, withdrawn or replaced at any time — by the property, by the issuing body, or by anyone with access to the file.
A Tuu Verified record is different. Once HLB signs off on a verification cycle, the result is registered on Blockmark with a time-stamped Record ID. Neither Tuu nor the property can backdate, edit or revoke the registry entry. A procurement reviewer who cites a Record ID is citing a public, independent record — not a hosted file.
The certificate.
Each verification cycle produces a signed certificate naming the property, the reporting period, and the Record ID under which the underlying Pack is registered.
Four Seasons Resort Chiang Mai
Verified Silver Bamboo, August 2025
HOMA Cherngtalay
Verified Gold Bamboo, August 2025
The registry entry.
Every certificate has a corresponding entry on the Blockmark registry. The registry page carries the same Record ID and timestamp, served from infrastructure Tuu doesn’t operate. That separation is the point — the record stands independently of the issuer.
Four Seasons Resort Chiang Mai
HOMA Cherngtalay
About Blockmark.
Blockmark is an independent technology platform that records certifications and verification outcomes on a public blockchain. Their role is the registry layer: receiving, time-stamping and serving records issued by verification bodies. They do not perform verification themselves and do not certify operational data. Tuu uses Blockmark because the recording layer needs to sit outside the verification body to mean anything.
Visit Blockmark →