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

Block 18516

Hash
000001195b515465f4fd783f379d22ba0b05d7d6b668b0abf6f91d69ceeb8081
Confirmations
22819
Time
2026-10-09 11:15:16 UTC
Median time
2026-10-09 11:06:51 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0035089589
Bits
1e011cfb
Merkle root
226f9ab4d2bb8a64d4d14ff56eff46f4a954750e9a5dcbd0241c333c2a22b310
Previous block
000001137b8d49b44d16675f6070565a06fc0a6676a540f4941dc700387bdf1d
Next block
00000018c43e43ca456555cf69ae5f6f705e7bb1431f8bd7e722ad85d3a638f7

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 18516 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
2cf87ca8f8d27a78005a2d5aeebc5b71… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
226f9ab4d2bb…333c2a22b310 coinbase1250