David Wallumrød
type: MusicGroup
genre: acoustic folk
description: David Wallumrød (born 1977) is a Norwegian pianist, known from cooperations with artists such as Knut Reiersrud, Torun Eriksen, Jarle Bernhoft, Marit Larsen, Maria Solheim, Vidar Busk, Bigbang, Maria
popularity: 3
followers: 87
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x2840629ccd7d4ed7f58c274b7bd319be413c7d5d08532d67bf27373729f93d09
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954705
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954705
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ed9298a6-6eee-463e-a19b-ba855e3fc2af.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ed9298a6-6eee-463e-a19b-ba855e3fc2af.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ed9298a6-6eee-463e-a19b-ba855e3fc2af
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-21T13:42:37Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x2840629ccd7d4ed7f58c274b7bd319be413c7d5d08532d67bf27373729f93d09","name":"David Wallumrød","registered_at":"2026-06-21T11:32:01Z","symbol":"NIM1912347","token_address":"0xd5b6f3ff3fdc2cbe1e671362f86fae421af4d75c","type":"artist","uuid":"ed9298a6-6eee-463e-a19b-ba855e3fc2af"}
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 0x2840629ccd7d4ed7f58c274b7bd319be413c7d5d08532d67bf27373729f93d09. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed9298a6-6eee-463e-a19b-ba855e3fc2af.json and https://artists.proofprofile.net/proofs/artist/ed9298a6-6eee-463e-a19b-ba855e3fc2af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T13:42:37Z
  text: {"copyright_id":"0x2840629ccd7d4ed7f58c274b7bd319be413c7d5d08532d67bf27373729f93d09","name":"David Wallumrød","registered_at":"2026-06-21T11:32:01Z","symbol":"NIM1912347","token_address":"0xd5b6f3ff3fdc2cbe1e671362f86fae421af4d75c","type":"artist","uuid":"ed9298a6-6eee-463e-a19b-ba855e3fc2af"}