Duncan Brown
type: MusicGroup
description: Duncan Brown (born 18 February 1972) is a South African former cricketer. He played in one first-class match for Eastern Province in 1991/92. See also List of Eastern Province representative cricket
popularity: 3
followers: 32
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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 0x41dfe347b4b5c23ca1766c46b92950dedd4256a292c30bc9e20a1a0eef2db48d. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/270a2243-3026-45ad-8329-5a9c04dbd4bc.json and https://artists.proofprofile.net/proofs/artist/270a2243-3026-45ad-8329-5a9c04dbd4bc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T22:46:20Z
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album: Chaotic Shifting Arp
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  date published: 2024-04-14
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    by artist: Duncan Brown
    in album: Chaotic Shifting Arp
      type: MusicAlbum
      date published: 2024-04-14
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    additional property: OTSVerifyInstructions
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      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec79a48b19d9ebe16b2881ebf242d06074aa175cc1fe98f32d11db3add6dcaa6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GX8LE2447923.
      date published: 2026-07-18T04:13:26Z
    audio: Chaotic Shifting Arp
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      additional property: Valence (Positivity)
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      additional property: Key Name
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