Matthew Tan
type: MusicGroup
description: Matthew Tan is a Singaporean musician and bandleader. He has led Matthew and the Mandarins in its various forms since the 1960s. He is also the co-composer of the hit songs "Singapore Cowboy" and "Let
popularity: 2
followers: 63
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x581f93ffcb042c6748b1a41649cbc54ac9ba7c5f7eec87701336f64cba8a8976
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954569
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954569
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b04b16a1-e9b2-4c79-949f-3806bbea9345.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/b04b16a1-e9b2-4c79-949f-3806bbea9345.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/b04b16a1-e9b2-4c79-949f-3806bbea9345
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T14:36:29Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x581f93ffcb042c6748b1a41649cbc54ac9ba7c5f7eec87701336f64cba8a8976","name":"Matthew Tan","registered_at":"2026-06-20T11:49:51Z","symbol":"NIM1605702","token_address":"0xe61c4862f4d7e9779fdc4e21dd483536c1970b76","type":"artist","uuid":"b04b16a1-e9b2-4c79-949f-3806bbea9345"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581f93ffcb042c6748b1a41649cbc54ac9ba7c5f7eec87701336f64cba8a8976. Chain 2 (Bitcoin): anchored in block 954569 (2026-06-20T14:36:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b04b16a1-e9b2-4c79-949f-3806bbea9345.json and https://artists.proofprofile.net/proofs/artist/b04b16a1-e9b2-4c79-949f-3806bbea9345.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T14:36:29Z
  text: {"copyright_id":"0x581f93ffcb042c6748b1a41649cbc54ac9ba7c5f7eec87701336f64cba8a8976","name":"Matthew Tan","registered_at":"2026-06-20T11:49:51Z","symbol":"NIM1605702","token_address":"0xe61c4862f4d7e9779fdc4e21dd483536c1970b76","type":"artist","uuid":"b04b16a1-e9b2-4c79-949f-3806bbea9345"}