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Operational TransparencyFILE 006 / PROOF LIBRARY

Don’t guess. Verify.

Check JVTO's legal identity, historical continuity and the founder's police assignment in the proof library.

Last reviewed 2026-08-06

JVTO's proof library publishes the official documents, independent press references and operational records behind its claims, each anchored to a SHA-256 hash that is re-verified weekly. The legal entity is PT Java Volcano Rendezvous, NIB (Indonesian Business Identification Number) 1102230032918, with TDUP (Tourism Business Registration) issued 2023-02-11, and both can be checked in an Indonesian government registry before you book.
DatabaseEvidence_Database_v2.0
Official documents12
Media references5
Operational records21
Hashes re-verified2026-11-09
StatusOPEN
EVIDENCE_DATABASE_v2.0
Preview: NIB 1102230032918 preview image (WebP).
Official authority

NIB 1102230032918 preview image (WebP).

Legal · Business IDOpen →
Preview: TDUP licence preview image (WebP).
Official authority

TDUP licence preview image (WebP).

Legal · LicenseOpen →
Preview: HPWKI approval letter preview image (WebP).
Official authority

HPWKI approval letter preview image (WebP).

Legal · MemberOpen →
Preview: SPRIN POLPAR (Tourist Police Assignment Letter)
Official authority

SPRIN POLPAR (Tourist Police Assignment Letter)

Tourist Police assignment letter (SPRIN POLPAR) preview image.

Safety · PoliceOpen →
Preview: SPRIN WAL-TRAVEL — traffic-escort order Sprin/70/II/HUK.6.6./2024, 12 February 2024
Official authority

SPRIN WAL-TRAVEL — traffic-escort order Sprin/70/II/HUK.6.6./2024, 12 February 2024

Police travel order (SPRIN WAL-TRAVEL), 12 Feb 2024 preview image.

Safety · PoliceOpen →
Preview: HPWKI licence (KTA) of Anjas.
Official authority

HPWKI licence (KTA) of Anjas.

Safety · CredentialsOpen →
Preview: HPWKI licence (KTA) of Gufron.
Official authority

HPWKI licence (KTA) of Gufron.

Safety · CredentialsOpen →
Preview: HPWKI licence (KTA) of Kiki.
Official authority

HPWKI licence (KTA) of Kiki.

Safety · CredentialsOpen →
Preview: HPWKI licence (KTA) of Rendi.
Official authority

HPWKI licence (KTA) of Rendi.

Safety · CredentialsOpen →
Preview: HPWKI licence (KTA) of Taufik.
Official authority

HPWKI licence (KTA) of Taufik.

Safety · CredentialsOpen →
Preview: Crater access terms (screenshot, tiket.bbksdajatim.org): health requirements and doctor certificate. That portal is retired; the current authority is ayoketamannasional.kehutanan.go.id
Official authority

Crater access terms (screenshot, tiket.bbksdajatim.org): health requirements and doctor certificate. That portal is retired; the current authority is ayoketamannasional.kehutanan.go.id

Safety · ScreeningOpen →
Preview: Medical Practice Licence (SIP) — dr. Ahmad Irwandanu (Bondowoso)
Official authority

Medical Practice Licence (SIP) — dr. Ahmad Irwandanu (Bondowoso)

Safety · ScreeningOpen →
Preview: Early third-party mention in a European travel guide.
Independent media

Early third-party mention in a European travel guide.

History · ArchiveOpen →
Preview: BBKSDA (East Java Nature Conservation Agency) official training article: HPWKI members participate in Ijen guide safety training (SAR & emergency first aid).
Independent media

BBKSDA (East Java Nature Conservation Agency) official training article: HPWKI members participate in Ijen guide safety training (SAR & emergency first aid).

Press · MediaOpen →
Preview: Press mention screenshot (Detik.com) with founder name variant in Tourist Police context.
Independent media

Press mention screenshot (Detik.com) with founder name variant in Tourist Police context.

Press · MediaOpen →
Preview: Press mention screenshot (Radar Jember) about Tourist Police formation for Ijen Geopark.
Independent media

Press mention screenshot (Radar Jember) about Tourist Police formation for Ijen Geopark.

Press · MediaOpen →
Preview: Stefan Loose Reiseführer Indonesien, Ost-JAVA | Ijen-Massiv, page 287.
Independent media

Stefan Loose Reiseführer Indonesien, Ost-JAVA | Ijen-Massiv, page 287.

History · ArchiveOpen →
Preview: Agung Sambuko (Mr. Sam), founder, in Tourist Police uniform - studio portrait.
Operational record

Agung Sambuko (Mr. Sam), founder, in Tourist Police uniform - studio portrait.

Safety · FounderOpen →
Preview: Pre-ascent lineup at Baratha Hotel with Tourist Police support.
Operational record

Pre-ascent lineup at Baratha Hotel with Tourist Police support.

Safety · OperationsOpen →
Preview: International group visiting JVTO Bondowoso operations office.
Operational record

International group visiting JVTO Bondowoso operations office.

Safety · OperationsOpen →
Preview: Evening welcome with guests at JVTO office.
Operational record

Evening welcome with guests at JVTO office.

Safety · OperationsOpen →
Preview: Tourist Police briefing at Ijen Geopark Information Center with local miners present.
Operational record

Tourist Police briefing at Ijen Geopark Information Center with local miners present.

Safety · OperationsOpen →
Preview: JVTO Bondowoso operations office.
Operational record

JVTO Bondowoso operations office.

Safety · OperationsOpen →
Preview: Traffic Police escorted arrival at the hotel in Bondowoso group photo with the patrol car.
Operational record

Traffic Police escorted arrival at the hotel in Bondowoso group photo with the patrol car.

Safety · OperationsOpen →
Preview: Arriving in Bondowoso with a Traffic Police escort group photo at the hotel after the journey.
Operational record

Arriving in Bondowoso with a Traffic Police escort group photo at the hotel after the journey.

Safety · OperationsOpen →
Preview: Police support vehicle and group prior to departure.
Operational record

Police support vehicle and group prior to departure.

Safety · OperationsOpen →
Preview: Pre-ascent health screening at partner hotel.
Operational record

Pre-ascent health screening at partner hotel.

Safety · ScreeningOpen →
Preview: Vitals taken and logged before night ascent.
Operational record

Vitals taken and logged before night ascent.

Safety · ScreeningOpen →
Preview: Dr. Ahmad Irwandanu attaches a fingertip pulse oximeter to a guest's finger during the Ijen pre-ascent health screening at Baratha Hotel, Bondowoso.
Operational record

Dr. Ahmad Irwandanu attaches a fingertip pulse oximeter to a guest's finger during the Ijen pre-ascent health screening at Baratha Hotel, Bondowoso.

Safety · ScreeningOpen →
Preview: Dr. Ahmad Irwandanu listens to a guest's chest with a stethoscope during the Ijen pre-ascent health screening at Baratha Hotel, Bondowoso.
Operational record

Dr. Ahmad Irwandanu listens to a guest's chest with a stethoscope during the Ijen pre-ascent health screening at Baratha Hotel, Bondowoso.

Safety · ScreeningOpen →
Preview: Dr. Ahmad Irwandanu and two assistants prepare the pulse oximeter and blood-pressure cuff before a guest's Ijen pre-ascent screening at Baratha Hotel, Bondowoso.
Operational record

Dr. Ahmad Irwandanu and two assistants prepare the pulse oximeter and blood-pressure cuff before a guest's Ijen pre-ascent screening at Baratha Hotel, Bondowoso.

Safety · ScreeningOpen →
Preview: Dr. Ahmad Irwandanu examines a second guest's chest with a stethoscope during the Ijen pre-ascent health screening at Baratha Hotel, Bondowoso.
Operational record

Dr. Ahmad Irwandanu examines a second guest's chest with a stethoscope during the Ijen pre-ascent health screening at Baratha Hotel, Bondowoso.

Safety · ScreeningOpen →
Preview: Digitally recorded, signed clearance issuance.
Operational record

Digitally recorded, signed clearance issuance.

Safety · ScreeningOpen →
Preview: Screening can be done at hotel or office.
Operational record

Screening can be done at hotel or office.

Safety · ScreeningOpen →
Preview: Sample printout of health clearance (surat sehat) preview image.
Operational record

Sample printout of health clearance (surat sehat) preview image.

Safety · ScreeningOpen →
Preview: Founder with Guests Holding Stefan Loose Guidebook (Homestad Era)
Operational record

Founder with Guests Holding Stefan Loose Guidebook (Homestad Era)

History · ArchiveOpen →
Preview: Booking.com Guest Review Award 2015 — Shipping Label (box)
Operational record

Booking.com Guest Review Award 2015 — Shipping Label (box)

History · ArchiveOpen →
Preview: Booking.com Guest Review Award 2015 — Plaque + Award Letter
Operational record

Booking.com Guest Review Award 2015 — Plaque + Award Letter

History · ArchiveOpen →
§ 02

History & continuity.

Since 2015

The operation began as Ijen Bondowoso Homestay in 2015 at the same Bondowoso address, under the same founder. PT Java Volcano Rendezvous holds it today, with its Ministry of Law decree and TDUP registration of 2023.

  1. '15

    2015 · Guesthouse

    Mr. Sam opens the Ijen Bondowoso Homestay on Jl. Khairil Anwar No.102. Booking.com guests rate it 9.4/10.

  2. '18

    2018 · Stefan Loose listing

    Stefan Loose Reiseführer Indonesien (4th ed., p. 287) names "Agung" as operator — an independent German guidebook.

  3. '21

    2021 · Independent press

    Detik.com and Radar Jember name Bripka Agung Sambuko in Tourist Police duties at Ijen Geopark.

  4. '23

    2023 · TDUP formalized

    Tourism Business Permit formalized 2023-02-11. NIB 1102230032918 OSS-verifiable.

  5. '26

    2026 · Today

    17 private itineraries; 11 published crew, each holding an HPWKI licence (KTA); coordinated Ijen health screening with a licensed physician.

Full artifact archive
Agung Sambuko – JVTO Founder & Tourist Police Officer
Bripka Agung Sambuko

Active Tourist Police · POLPAR Bondowoso, POLRI

§ 03

Police & safety proof.

Tourist Police Leadership

Founder Agung Sambuko is a serving Tourist Police (POLPAR) officer at Polres Bondowoso under Sprin/4954/XI/2020. The assignment letter is published in the proof library with its SHA-256 hash.

Ijen Health Screening

Mandatory for every Ijen guest under BBKSDA SE.35/K2/BIDTEK.1/KSA/1/2024: JVTO screens each guest before the ascent under SOP IHS-SOP-001, with licensed physician dr. Ahmad Irwandanu responsible, and records every result.

Guides with HPWKI cards

JVTO's Ijen guides hold KTA cards from HPWKI, the Ijen guide association registered under AHU-0001072.AH.01.07.TAHUN 2024. BBKSDA Jawa Timur ran a three-day search-and-rescue and emergency-medical (PPGD) training for 250 HPWKI guides at Paltuding on 20–22 May 2024.

View police credentials
§ 04

Independent platform ratings.

Trustpilot · Google Maps · TripAdvisor

284 independent reviews across three platforms · Google Maps is the schema-primary AggregateRating source

§ 05

Verification FAQ.

Six questions to ask any operator, answered with evidence

Who am I trusting?
Java Volcano Tour Operator (JVTO) is run by PT Java Volcano Rendezvous from its operations office at Jl. Khairil Anwar No.102 A, Bondowoso, under NIB (Business Identification Number) and TDUP (Tourism Business Registration) 1102230032918 and Menkumham decree AHU-0010187.AH.01.01.TAHUN 2023.
Where this is answeredOpen document
Who will manage me on the ground?
Groups of 1–3 guests travel with one English-speaking driver-guide; groups of 4–11 have a driver plus a separate escort guide, and licensed local site guides join where a site requires them. JVTO's Ijen guides carry member cards (KTA) from HPWKI (Himpunan Pelaku Wisata Khusus Ijen, the Ijen guide association) and attended the guide training run by BBKSDA (Balai Besar Konservasi Sumber Daya Alam, the East Java conservation agency) on 20–22 May 2024.
Where this is answeredOpen document
What happens across several days?
One booking covers the whole sequence — pickup, private vehicle, hotels with breakfast, entrance tickets and permits, the Ijen screening where Ijen is on the route, and the final drop-off — and every inclusion is written on the E-Voucher, the binding document.
Where this is answeredOpen document
What happens when conditions change?
When BBKSDA, the Bromo national park or BNPB closes a site, JVTO follows the closure, contacts guests before the day, offers the written Plan-B alternatives for that route, and applies the policy remedies when an element cannot run.
Where this is answeredOpen document
How are health and destination risks governed?
Every guest on an Ijen itinerary is screened before the ascent, at the hotel or the JVTO office, under SOP IHS-SOP-001 with dr. Ahmad Irwandanu as responsible physician; the screening result decides whether the guest climbs, and website content is not a diagnosis.
Where this is answeredOpen document
What can I independently verify?
Each licence, decree and assignment letter JVTO cites is published with its issuer, number and SHA-256 hash, and the company registration can be checked independently in the OSS and AHU registries.
On this pageOpen document
FAQ

Frequently Asked Questions

What kinds of proof does JVTO publish before booking?

Four layers: (1) Legal — NIB/TDUP/AHU registration verifiable on Indonesian government registries; (2) Police — founder Bripka Agung Sambuko's SPRIN-POLPAR and SPRIN-WAL-TRAVEL assignment documents plus Detik.com identity confirmation; (3) Press & Recognition — the Stefan Loose editorial feature, the Booking.com 2015 award, and the Detik 2021 article; (4) History & Artifacts — operational continuity from the 2015 guesthouse era through the 2023 PT formalization.

Is Java Volcano Tour Operator a legal business in Indonesia?

Yes. JVTO operates under PT Java Volcano Rendezvous with Business Identification Number (NIB) 1102230032918 and a TDUP tourism licence under the same identifier (issued 2023-02-11). Both are searchable on the Indonesian government OSS (Online Single Submission) and AHU registries.

How can I verify the documents provided by JVTO?

Download the original file, compute its SHA-256 locally, and compare it to the published value to detect tampering. Where a registry link is provided, follow it to cross-check the details on the official government portal.

Why publish proof at all instead of just describing the tours?

Publishing the government registry IDs and document scans lets travellers confirm each claim through Indonesian data sources, from abroad and before paying any deposit, instead of relying on an operator's description of itself.

What safety standards does JVTO follow for Ijen Crater tours?

Every climber is screened before the ascent, which BBKSDA SE.35/K2/BIDTEK.1/KSA/1/2024 makes mandatory, under SOP IHS-SOP-001 with licensed physician dr. Ahmad Irwandanu responsible. Guides holding HPWKI cards (KTA) lead the crater descent.

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