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

Block 18121

Hash
000000e63acc015c93e6abcf60c6ad2db97bf2a0aec7d062c0a756bda026f845
Confirmations
23669
Time
2026-10-09 00:11:34 UTC
Median time
2026-10-09 00:03:16 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0040172004
Bits
1e00f8ed
Merkle root
7400404926a75f51995e8ba9a09adb75b4cd795ea0860cce727bd9454f63ea53
Previous block
0000009d6e0c8c8496a03e4c2aea8d637e206216ea92ceac912567c9982c9f67
Next block
000000979c6f0e7a6d2049dfea22a714a28591fd46be28fb8ee658ffc7970be2

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 18121 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
cc4249436f2686aa9743345bbb4ad6d7… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
7400404926a7…d9454f63ea53 coinbase1250