SiGRÚN
type: MusicGroup
popularity: 4
followers: 667
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd0a25eaf732eb976941152c8def5bb961a4efd850eb5c9e78f0f78957ad8bea0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4dd6ad85-e8e0-4d87-b574-0e04e7a4b6ec.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4dd6ad85-e8e0-4d87-b574-0e04e7a4b6ec.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4dd6ad85-e8e0-4d87-b574-0e04e7a4b6ec
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xd0a25eaf732eb976941152c8def5bb961a4efd850eb5c9e78f0f78957ad8bea0","name":"SiGRÚN","registered_at":"2026-06-16T16:38:36Z","symbol":"NIM1111746","token_address":"0x292235dc6679f220e4b8c1f1abf8c70264945eca","type":"artist","uuid":"4dd6ad85-e8e0-4d87-b574-0e04e7a4b6ec"}
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 0xd0a25eaf732eb976941152c8def5bb961a4efd850eb5c9e78f0f78957ad8bea0. 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/4dd6ad85-e8e0-4d87-b574-0e04e7a4b6ec.json and https://artists.proofprofile.net/proofs/artist/4dd6ad85-e8e0-4d87-b574-0e04e7a4b6ec.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0xd0a25eaf732eb976941152c8def5bb961a4efd850eb5c9e78f0f78957ad8bea0","name":"SiGRÚN","registered_at":"2026-06-16T16:38:36Z","symbol":"NIM1111746","token_address":"0x292235dc6679f220e4b8c1f1abf8c70264945eca","type":"artist","uuid":"4dd6ad85-e8e0-4d87-b574-0e04e7a4b6ec"}
album: Hringsjá
  type: MusicAlbum
  date published: 2016-08-12
album: Tog
  type: MusicAlbum
  date published: 2016-12-09
album: Anneal Me
  type: MusicAlbum
  date published: 2018-08-26
album: Vex
  type: MusicAlbum
  date published: 2018-09-09
album: Onælan
  type: MusicAlbum
  date published: 2018-09-22
  track: Vex
    type: MusicRecording
    duration: PT4M26S
    duration ms: 266571
    explicit: false
    by artist: SiGRÚN
    in album: Onælan
      type: MusicAlbum
      date published: 2018-09-22
    isrc code: ISV441845501
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-19T09:59:23+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xaa039e1ca32ebd8c61f33d4260934f9816dd75c82394aa7bd7909e5150af3cf9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958716
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958716
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV441845501
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T10:15:55Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa039e1ca32ebd8c61f33d4260934f9816dd75c82394aa7bd7909e5150af3cf9. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ISV441845501.
      date published: 2026-07-19T10:15:55Z
    audio: Vex
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 109.919
      additional property: Musical Key
        type: PropertyValue
        value: 10
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.454
      additional property: Energy
        type: PropertyValue
        value: 0.373
      additional property: Speechiness
        type: PropertyValue
        value: 0.035
      additional property: Acousticness
        type: PropertyValue
        value: 0.418
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.018
      additional property: Liveness
        type: PropertyValue
        value: 0.222
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.047
      additional property: Loudness (dB)
        type: PropertyValue
        value: -12.448
      additional property: Key Name
        type: PropertyValue
        value: Bb
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Exhale Your Song
  type: MusicAlbum
  date published: 2019-07-13
album: Arfur
  type: MusicAlbum
  date published: 2021-03-03
album: Catching up
  type: MusicAlbum
  date published: 2024-04-18
album: Monster Milk / Thirst for first
  type: MusicAlbum
  date published: 2024-06-20
album: Monster Milk
  type: MusicAlbum
  date published: 2024-10-24