DemoFor public education only. These blocks are built by PisoScan from published PhilGEPS records to show how a budget ledger like CADENA would work. No government agency created or signed them, and this is not an official ledger. How it works

Transaction details

API

Transaction action

CITY OF ZAMBOANGA, ZAMBOANGA DEL SUR Award a ₱589.3K contract to MELANZA CONSTRUCTION & SUPPLYCities

Transaction hash:

256679eec1af3f91c9ba2fd81bc747bf1c386bb341c41900e9a5f20d9fdd97b0

Status:

Included and unchanged

Block:

#1,134 4,879 blocks after it

Position in block:

Transaction 4 of 38

Award day:

May 3, 2011 (15 yrs 6 mo ago)

From:

CITY OF ZAMBOANGA, ZAMBOANGA DEL SUR

To:

MELANZA CONSTRUCTION & SUPPLY

Value:

₱589,255.38

Project:

Construction of Drainage System from Market Site to Creek Bridge 2 at Purok 3, Sangali

Full record:

Open the award page

Accountability

Bill Sec. 3 and 19

Responsible agency:

CITY OF ZAMBOANGA, ZAMBOANGA DEL SUR

Accountable officer:

Not stated in the source. PhilGEPS does not publish who certified the award.

Certification:

Not certified No agency signed this record. Under CADENA the accountable officer would sign it with their own key.

Demo signature:

Block #1,134 signature valid Demo key, proves nothing about the governmentPublic key

Linked records: from budget to payment

Bill Sec. 5

1. Appropriation
GAA line item · Sec. 5(b)
The award does not say which budget line pays for it.
Not published
2. Allotment release
SARO / allotment · Sec. 5(c)(iii)
Not published per project. DBM releases SAROs, but not linked to individual contracts.
Not published
3. Cash allocation
Notice of Cash Allocation · Sec. 5(c)(iv)
Not published per project.
Not published
4. Contract award
Notice of Award (PhilGEPS) · Sec. 5(d)
CITY OF ZAMBOANGA, ZAMBOANGA DEL SUR awarded it to MELANZA CONSTRUCTION & SUPPLY on 2011-05-03.
Found
Open
5. Contract & progress
Contract / progress report (DPWH) · Sec. 5(d)
No matching DPWH contract record (only DPWH contracts are listed with progress).
Not published
6. Payment
Disbursement voucher · Sec. 5(c)(viii)
Not published. No public source shows how much of this contract has been paid.
Not published
7. Completion
Certificate of completion · Sec. 5(d)
No completion certificate published.
Not published
8. Audit
COA annual audit report · Sec. 5(e)(iii)
COA's CY2024 audit of City of Zamboanga gave a "qualified" opinion on its financial statements (not specific to this contract).
Partly
Open

1 of 8 documents found, 1 partly. Under CADENA every step would be published within 7 working days and linked to this record.

Tamper test: try changing this record

Demo

Edit the amount as if someone quietly changed the record. Your browser re-hashes it and walks up the chain. Nothing is saved.

Contract amount (₱)

1. Record fingerprint changed
stored 256679eec1…dd97b0now …
2. Block Merkle root changed
stored c3a7c8c3fd…115540now …
3. Block #1134 hash changed
stored 2a1908ec79…a78a05now …

Chain intact. The record matches its fingerprint, so the block and every block after it still line up.

Merkle proof (6 steps)

How this one record is tied to the block's Merkle root, without needing the other 37 records. Each step hashes the current value together with the sibling shown.

leaf 256679eec1af3f91c9ba2fd81bc747bf1c386bb341c41900e9a5f20d9fdd97b0
01 R 27c8a16d2665fa52ea67747b83d8e9e432d1df47ecc3a9d55447965c37850c2f
02 R 91711949cf37877c1ad87343d307199e4a74d6c27741824af11cb6a828f6752c
03 L c5a686cec544ccf818b28fba600fdac3a00a3e04a8064b27cf105c242b6dd5d3
04 R 53a62ebf4938d7387dbfeda87a75a5c094588b6f51fb3f02fdc512ca56ad8fcb
05 R 8b8580d66f976ba0d2ff857d833110db2079f341ba525bfff53b8968abce85ff
06 R 72ddf56f88b104303d55a4ec92efac5c7876bdbbd5ce0e1b8e960f8e70184d42
root c3a7c8c3fd0a1e018c01d2a7488a7f9758e8ea17ffada943d65711808d115540