Hampus Hedström
type: MusicGroup
popularity: 3
followers: 2825
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6f27e2cbd3da4e412a3401d37bc5ec5001f29ee970fb1a8b66fd8f40c4933d8f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954017
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954017
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/354d758a-5d60-4220-8517-714aa5639d75.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/354d758a-5d60-4220-8517-714aa5639d75.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/354d758a-5d60-4220-8517-714aa5639d75
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T23:38:33Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6f27e2cbd3da4e412a3401d37bc5ec5001f29ee970fb1a8b66fd8f40c4933d8f","name":"Hampus Hedström","registered_at":"2026-06-16T08:27:59Z","symbol":"NIM0994693","token_address":"0xbf5cabca2198788342383a8ea41b531289314650","type":"artist","uuid":"354d758a-5d60-4220-8517-714aa5639d75"}
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 0x6f27e2cbd3da4e412a3401d37bc5ec5001f29ee970fb1a8b66fd8f40c4933d8f. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/354d758a-5d60-4220-8517-714aa5639d75.json and https://artists.proofprofile.net/proofs/artist/354d758a-5d60-4220-8517-714aa5639d75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x6f27e2cbd3da4e412a3401d37bc5ec5001f29ee970fb1a8b66fd8f40c4933d8f","name":"Hampus Hedström","registered_at":"2026-06-16T08:27:59Z","symbol":"NIM0994693","token_address":"0xbf5cabca2198788342383a8ea41b531289314650","type":"artist","uuid":"354d758a-5d60-4220-8517-714aa5639d75"}
album: Vegan På Jul
  type: MusicAlbum
  date published: 2017-12-08