Guðmundur Ingólfsson
type: MusicGroup
description: Guðmundur Ármann Ingólfsson (28 April 1929 – 13 August 1987) was an Icelandic swimmer. He competed in the men's 100 metre backstroke at the 1948 Summer Olympics. References External links Categor
popularity: 2
followers: 356
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x059730bf0603917ad2a463139ef7709f96a575a2e433cc632d15ea23b056b970
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6e588310-bfc5-46ca-ba59-348b71428f19.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/6e588310-bfc5-46ca-ba59-348b71428f19.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/6e588310-bfc5-46ca-ba59-348b71428f19
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x059730bf0603917ad2a463139ef7709f96a575a2e433cc632d15ea23b056b970","name":"Guðmundur Ingólfsson","registered_at":"2026-06-17T04:03:44Z","symbol":"NIM1275226","token_address":"0xdca8605a8d48571ef29231221a92361dba57360d","type":"artist","uuid":"6e588310-bfc5-46ca-ba59-348b71428f19"}
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 0x059730bf0603917ad2a463139ef7709f96a575a2e433cc632d15ea23b056b970. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e588310-bfc5-46ca-ba59-348b71428f19.json and https://artists.proofprofile.net/proofs/artist/6e588310-bfc5-46ca-ba59-348b71428f19.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x059730bf0603917ad2a463139ef7709f96a575a2e433cc632d15ea23b056b970","name":"Guðmundur Ingólfsson","registered_at":"2026-06-17T04:03:44Z","symbol":"NIM1275226","token_address":"0xdca8605a8d48571ef29231221a92361dba57360d","type":"artist","uuid":"6e588310-bfc5-46ca-ba59-348b71428f19"}
album: Þjóðlegur fróðleikur
  type: MusicAlbum
  date published: 1988
album: Þjóðlegur fróðleikur
  type: MusicAlbum
  date published: 1988-01-01
album: Þjóðlegur fróðleikur
  type: MusicAlbum
  date published: 1988-01-01
album: Guðmundur Ingólfsson
  type: MusicAlbum
  date published: 1994
album: Guðmundur Ingólfsson
  type: MusicAlbum
  date published: 1994-01-01