Otto Grundström
type: MusicGroup
genre: children's music
genre: finnish pop
genre: finnish rock
popularity: 4
followers: 139
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc628bd5f03a14fb6a79be201138a424477393e383b43a7bd9a3568126899e375
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953975
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953975
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2b3ceab7-0385-4a0e-a3d1-9a29de5f8ed6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/2b3ceab7-0385-4a0e-a3d1-9a29de5f8ed6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/2b3ceab7-0385-4a0e-a3d1-9a29de5f8ed6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T16:53:41Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc628bd5f03a14fb6a79be201138a424477393e383b43a7bd9a3568126899e375","name":"Otto Grundström","registered_at":"2026-06-16T04:34:11Z","symbol":"NIM0938855","token_address":"0xeca5f089c0202334c1a0aa506c43be27864c2a15","type":"artist","uuid":"2b3ceab7-0385-4a0e-a3d1-9a29de5f8ed6"}
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 0xc628bd5f03a14fb6a79be201138a424477393e383b43a7bd9a3568126899e375. Chain 2 (Bitcoin): anchored in block 953975 (2026-06-16T16:53:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b3ceab7-0385-4a0e-a3d1-9a29de5f8ed6.json and https://artists.proofprofile.net/proofs/artist/2b3ceab7-0385-4a0e-a3d1-9a29de5f8ed6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T16:53:41Z
  text: {"copyright_id":"0xc628bd5f03a14fb6a79be201138a424477393e383b43a7bd9a3568126899e375","name":"Otto Grundström","registered_at":"2026-06-16T04:34:11Z","symbol":"NIM0938855","token_address":"0xeca5f089c0202334c1a0aa506c43be27864c2a15","type":"artist","uuid":"2b3ceab7-0385-4a0e-a3d1-9a29de5f8ed6"}