Sigurd Islandsmoen
type: MusicGroup
description: thumb|Sigurd Islandsmoen Sigurd Islandsmoen (August 27, 1881 – July 1, 1964) was a Norwegian composer. Sigurd Islandsmoen made significant contributions to the music of the Church of Norway. In all h
popularity: 4
followers: 111
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc9f6ef7cdfeab18ce615a4e171a724821d9438f248d94a9d1bc36eb4bb8986ad
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953938
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953938
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/20982251-763a-4d70-9736-780444e489fa.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/20982251-763a-4d70-9736-780444e489fa.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/20982251-763a-4d70-9736-780444e489fa
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T11:35:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc9f6ef7cdfeab18ce615a4e171a724821d9438f248d94a9d1bc36eb4bb8986ad","name":"Sigurd Islandsmoen","registered_at":"2026-06-16T00:51:20Z","symbol":"NIM0885620","token_address":"0x35dd938e0556579933fe6c9b0dd8b158736aa30a","type":"artist","uuid":"20982251-763a-4d70-9736-780444e489fa"}
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 0xc9f6ef7cdfeab18ce615a4e171a724821d9438f248d94a9d1bc36eb4bb8986ad. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/20982251-763a-4d70-9736-780444e489fa.json and https://artists.proofprofile.net/proofs/artist/20982251-763a-4d70-9736-780444e489fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0xc9f6ef7cdfeab18ce615a4e171a724821d9438f248d94a9d1bc36eb4bb8986ad","name":"Sigurd Islandsmoen","registered_at":"2026-06-16T00:51:20Z","symbol":"NIM0885620","token_address":"0x35dd938e0556579933fe6c9b0dd8b158736aa30a","type":"artist","uuid":"20982251-763a-4d70-9736-780444e489fa"}
album: Islandsmoen Requiem
  type: MusicAlbum
  date published: 2006-08-20