Ark-0
Ark-0 is a test network for trying things out. It may be reset at any time.

Block 19876

Hash
0000004dd013ab49ee9055b3d31f34eb428c78bc5b702487f01bc65aff23d0eb
Confirmations
22379
Time
2026-10-11 01:12:01 UTC
Median time
2026-10-11 01:04:21 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
c8da602c02b5285494970e5888669adc9949bd86ccd1d625ab3b6fcfbf201ce6
Previous block
000000b4615c7b2276d398e521aa68820f7451d8008790a8d5f1bc7602b0a4f3
Next block
000000ed7f9a7ed74841c973cbf85ef84a2dcbff692d87f4936c0e1e77a64ca2

ML-DSA-44 block signature (M2)

M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.

Block 19876 is below the activation height 20000: nodes do not require this signature, and only log the result of checking it when run with -debug=validation. The block producer adds it from height 18000 on, so that nodes can check it before it is required.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
270672c74d0a52e9567f709e18373325… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
c8da602c02b5…6fcfbf201ce6 coinbase1250