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

Block 21836

Hash
00000135e78b82dea993ed0e0e8dc4450305f06254d7e38206c3dec80cf47ee9
Confirmations
19515
Time
2026-10-13 07:40:22 UTC
Median time
2026-10-13 07:32:05 UTC
Transactions
1
Size
2,772
Weight
10,980
Difficulty
0.0031405554
Bits
1e013e69
Merkle root
1920557743bc8159c2b91f38e9e08e8fa18b150f492ed55f48a5d0d4a989c549
Previous block
00000035bd777517a1f8d8e1e9d3548904a684a4cad1dabc7105e691eedef78b
Next block
0000005ab3b03d61f381761ef3991d7f52caf4095d35210168d05b9e2d251b3d

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 21836 is at or above the activation height 20000: nodes that enforce M2 accept a block there only with a valid ML-DSA-44 block signature.

The node behind this site enforces M2 and holds this block, so its block signature passed the node's check.

Status
In the form M2 requires, followed by the signet solution push (the classical signature)
Signature
69b3d8c5cf3eeea893d0951a91017633… (2420 B)
Format version
0x01
Context string
SIGNET/PQBLOCK/EXP0
Block key the nodes require
SHA-256 eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad

Transactions

txidInputsOutputsAmountFee
1920557743bc…d0d4a989c549 coinbase1250