Johan Larsson
type: MusicGroup
description: Johan Larsson may refer to: Johan Larsson (bassist) (born 1974), Swedish heavy metal bass guitarist Johan Larsson (ice hockey, born 1986), Swedish ice hockey player Johan Larsson (ice hockey, born
popularity: 4
followers: 721
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa7c5cb28b231930032de765754bc643aadd9cfd492ce7d95f5ce1516e9accf11
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954618
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954618
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c798be48-7b60-4e1b-b655-2e2f9f7d2899.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/c798be48-7b60-4e1b-b655-2e2f9f7d2899.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/c798be48-7b60-4e1b-b655-2e2f9f7d2899
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T23:05:13Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa7c5cb28b231930032de765754bc643aadd9cfd492ce7d95f5ce1516e9accf11","name":"Johan Larsson","registered_at":"2026-06-20T21:34:48Z","symbol":"NIM1722494","token_address":"0x828353d1258c7629a4cb67dc5a781f72e62d4ac9","type":"artist","uuid":"c798be48-7b60-4e1b-b655-2e2f9f7d2899"}
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 0xa7c5cb28b231930032de765754bc643aadd9cfd492ce7d95f5ce1516e9accf11. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c798be48-7b60-4e1b-b655-2e2f9f7d2899.json and https://artists.proofprofile.net/proofs/artist/c798be48-7b60-4e1b-b655-2e2f9f7d2899.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T23:05:13Z
  text: {"copyright_id":"0xa7c5cb28b231930032de765754bc643aadd9cfd492ce7d95f5ce1516e9accf11","name":"Johan Larsson","registered_at":"2026-06-20T21:34:48Z","symbol":"NIM1722494","token_address":"0x828353d1258c7629a4cb67dc5a781f72e62d4ac9","type":"artist","uuid":"c798be48-7b60-4e1b-b655-2e2f9f7d2899"}
album: Good Good Father
  type: MusicAlbum
  date published: 2015-06-24