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

Block 18618

Hash
000000cfe46a246847ec4816396ad82034d0523352f31df258ba4b6bda3d2738
Confirmations
22208
Time
2026-10-09 14:03:17 UTC
Median time
2026-10-09 13:55:11 UTC
Transactions
2
Size
2,977
Weight
11,596
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
ed88bf032e1414fe01c92c8037ecdb6fbc3d5aba15c8e860721f2f1e529d6982
Previous block
000000a7c671bcd1ee9db3b650a7e3470c2c803ddea8511cb5658b2ec1aefbb7
Next block
00000075e791bbecd994bd7d479a01c40deda6a2576395bebeef1f381f99f44e

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 18618 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
7b1ba71ef068ce9fef6f6508e16c0047… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
1bbcc1776282…b76d8f2add61 coinbase1250.0000031
b62176f5a4d5…df31b1ba0807 pays to P2MR1242.9999750.0000031