Jan Gunnar Hoff
type: MusicGroup
genre: jazz fusion
description: Jan Gunnar Hoff (born 22 October 1958) is a Norwegian jazz pianist, composer, arranger and professor, living in Bodø, known from cooperations with jazz musicians like Pat Metheny, Mike Stern, Alex Acu
popularity: 12
followers: 1978
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x143a15edf5e6d90fd5cfadf40de3905d69f5fcdbaf24125f7feed8a5c77bfd07
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953697
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953697
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/54ad665b-ee12-4014-84fb-fbac678540ac.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/54ad665b-ee12-4014-84fb-fbac678540ac.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/54ad665b-ee12-4014-84fb-fbac678540ac
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T21:49:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x143a15edf5e6d90fd5cfadf40de3905d69f5fcdbaf24125f7feed8a5c77bfd07","name":"Jan Gunnar Hoff","registered_at":"2026-06-14T13:19:13Z","symbol":"NIM0465135","token_address":"0x7ffc6cfa87ba38b1d3d50ddf1ec4979c6872b67d","type":"artist","uuid":"54ad665b-ee12-4014-84fb-fbac678540ac"}
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 0x143a15edf5e6d90fd5cfadf40de3905d69f5fcdbaf24125f7feed8a5c77bfd07. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54ad665b-ee12-4014-84fb-fbac678540ac.json and https://artists.proofprofile.net/proofs/artist/54ad665b-ee12-4014-84fb-fbac678540ac.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T21:49:28Z
  text: {"copyright_id":"0x143a15edf5e6d90fd5cfadf40de3905d69f5fcdbaf24125f7feed8a5c77bfd07","name":"Jan Gunnar Hoff","registered_at":"2026-06-14T13:19:13Z","symbol":"NIM0465135","token_address":"0x7ffc6cfa87ba38b1d3d50ddf1ec4979c6872b67d","type":"artist","uuid":"54ad665b-ee12-4014-84fb-fbac678540ac"}
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