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

Block 18195

Hash
000000a48a49efa3ea4389503200d334fda7570726b0d5d2d00dc8b4f26de3d0
Confirmations
23248
Time
2026-10-09 02:16:28 UTC
Median time
2026-10-09 02:08:43 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
0fa355eceeb8b2facae41397f9ce81cb3bb8f25d5342273d1cb707f5763df1a2
Previous block
000000d7c0a6477673ec2c7ae042d64f512d379daee9c6e353c2876a7fb2307b
Next block
0000004538cc57ea045055c08717331b22ec0eda4cd60ada8a8078929f0616ba

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 18195 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
2b26a147a70a80cd62f6231d187be19f… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
0fa355eceeb8…07f5763df1a2 coinbase1250