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

Block 18715

Hash
0000008e29df8268a832d4e27e65453c3440cfaf0a54c4c31c5ba79b1f953d14
Confirmations
23268
Time
2026-10-09 16:42:57 UTC
Median time
2026-10-09 16:34:43 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
5e37c15267b4286e1eb658d59282e8d0f141aa0cbf0328b0a3698c774e75f0fe
Previous block
00000068274cb9a2872647d32b48b95e1d56b072fceb99a3173098cc67306a94
Next block
00000015841e3693f90e51ad7b16ef4507b7400a551cc2d90646242c8fff4026

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 18715 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
1ab70e84e5c4b3c91839d7e12c4e7e59… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
5e37c15267b4…8c774e75f0fe coinbase1250