Niklas Mattsson
type: MusicGroup
description: Niklas Mattsson (born 16 March 1992) is a snowboarder from Sweden. He won a silver medal at the 2011 FIS Snowboarding World Championships in the slopestyle event. Mattsson was born in Sundsvall. Refe
popularity: 2
followers: 44
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd22a2b3279bb92966f99338b2080ea9c741175692947d213ab1749981756609f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954088
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954088
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7aa2697c-7370-4425-b3f4-2b69a2d759d1.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7aa2697c-7370-4425-b3f4-2b69a2d759d1.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7aa2697c-7370-4425-b3f4-2b69a2d759d1
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T11:10:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd22a2b3279bb92966f99338b2080ea9c741175692947d213ab1749981756609f","name":"Niklas Mattsson","registered_at":"2026-06-17T08:24:22Z","symbol":"NIM1337374","token_address":"0x52dfc7d558d5e602d562a5c33cd1f7be0622ebd6","type":"artist","uuid":"7aa2697c-7370-4425-b3f4-2b69a2d759d1"}
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
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22a2b3279bb92966f99338b2080ea9c741175692947d213ab1749981756609f. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7aa2697c-7370-4425-b3f4-2b69a2d759d1.json and https://artists.proofprofile.net/proofs/artist/7aa2697c-7370-4425-b3f4-2b69a2d759d1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T15:44:10Z
  text: {"copyright_id":"0xd22a2b3279bb92966f99338b2080ea9c741175692947d213ab1749981756609f","name":"Niklas Mattsson","registered_at":"2026-06-17T08:24:22Z","symbol":"NIM1337374","token_address":"0x52dfc7d558d5e602d562a5c33cd1f7be0622ebd6","type":"artist","uuid":"7aa2697c-7370-4425-b3f4-2b69a2d759d1"}
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