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

Block 19338

Hash
0000009dd4857a93a2231ba1288605c94e3336d551b2647a81bbf6509ed5c601
Confirmations
21154
Time
2026-10-10 10:11:11 UTC
Median time
2026-10-10 10:03:19 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
526e1d78093f0e304aa633b3d5bf2cf61f6c8e4df33260a13f6df7f74ac9b8ee
Previous block
00000082731d0ac9e5dbdf4d5e786dcb9efa4e4674f4ff51a35031f4d3d685ec
Next block
00000056ccbc35eac6f81f2f9df61f90560fa02188908f31f62d9f83fe0e2a3d

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 19338 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
15fa4759f6878ac6ca43f1ccb827c5e8… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
526e1d78093f…f7f74ac9b8ee coinbase1250