Mark Mathews
type: MusicGroup
genre: space rock
description: Mark Mathews is an Australian professional big wave surfer. Early life Mathews was frightened of the ocean as a child and spent his childhood visits with family to the ocean sitting on the beach. La
popularity: 8
followers: 297
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additional property: OTSVerifyInstructions
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  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c3af5e1652563cca1b20e43d19cc23c7c27f2a5e155fa355e0ef2729e80960. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbcdd9c5-e51a-4c29-b024-5e926c3997b7.json and https://artists.proofprofile.net/proofs/artist/cbcdd9c5-e51a-4c29-b024-5e926c3997b7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T23:40:06Z
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