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

Block 18552

Hash
000000a126484464a7d308ad505f45407a648c26ca4cc1243e58d63f1dd26d20
Confirmations
21883
Time
2026-10-09 12:15:35 UTC
Median time
2026-10-09 12:07:15 UTC
Transactions
2
Size
2,977
Weight
11,596
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
4860f6a18e91c785eb965656e19830abffbf5e7ddbdf8d11a4fa03ffe362e890
Previous block
00000017e9e2ba6d583d561a610c0fe74ee6b09bf40b76241d9cdfc14458b776
Next block
000000b4fa2bc6ce7535263ad5aabf88ec1e92214fc49c3ffd20c183f196aeef

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 18552 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
f9fe79d9d09f6ef0ca5be72b792dc3db… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
6071a2cf4652…c2677e614c8d coinbase1250.0000031
fc5eed216346…c082a5d7317a pays to P2MR127.99986650.0000031