Once Upon a Winter
type: MusicGroup
genre: post-rock
genre: space rock
popularity: 7
followers: 1981
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x78723513d754aa25f525699231cabc79d4c6ac3f90ee66fad022e6ae628e9f57
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/67ed7fef-ccb4-4a3b-9c49-4c81fc79be89.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/67ed7fef-ccb4-4a3b-9c49-4c81fc79be89.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/67ed7fef-ccb4-4a3b-9c49-4c81fc79be89
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x78723513d754aa25f525699231cabc79d4c6ac3f90ee66fad022e6ae628e9f57","name":"Once Upon a Winter","registered_at":"2026-06-17T01:53:23Z","symbol":"NIM1244112","token_address":"0x96251f9f1c68767e01455065c72447df8adde51d","type":"artist","uuid":"67ed7fef-ccb4-4a3b-9c49-4c81fc79be89"}
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 0x78723513d754aa25f525699231cabc79d4c6ac3f90ee66fad022e6ae628e9f57. 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/67ed7fef-ccb4-4a3b-9c49-4c81fc79be89.json and https://artists.proofprofile.net/proofs/artist/67ed7fef-ccb4-4a3b-9c49-4c81fc79be89.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x78723513d754aa25f525699231cabc79d4c6ac3f90ee66fad022e6ae628e9f57","name":"Once Upon a Winter","registered_at":"2026-06-17T01:53:23Z","symbol":"NIM1244112","token_address":"0x96251f9f1c68767e01455065c72447df8adde51d","type":"artist","uuid":"67ed7fef-ccb4-4a3b-9c49-4c81fc79be89"}
album: Selective Depression in Chase of the Big Bang
  type: MusicAlbum
  date published: 2017-02-20
  track: Once Upon a Winter
    type: MusicRecording
    duration: PT4M22S
    duration ms: 262034
    explicit: false
    by artist: Once Upon a Winter
    in album: Selective Depression in Chase of the Big Bang
      type: MusicAlbum
      date published: 2017-02-20
    genre: post-rock
    genre: space rock
    isrc code: QM4DW1874160
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-21T03:18:03+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x84b48ea6185bb2745999bd477793181d4caf932315196e140101f1972275140a
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958959
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958959
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4DW1874160
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-21T03:51:22Z
    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 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 0x84b48ea6185bb2745999bd477793181d4caf932315196e140101f1972275140a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM4DW1874160.
      date published: 2026-07-21T03:51:22Z
    audio: Once Upon a Winter
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 120.04
      additional property: Musical Key
        type: PropertyValue
        value: 0
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.497
      additional property: Energy
        type: PropertyValue
        value: 0.525
      additional property: Speechiness
        type: PropertyValue
        value: 0.036
      additional property: Acousticness
        type: PropertyValue
        value: 0.001
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.78
      additional property: Liveness
        type: PropertyValue
        value: 0.145
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.05
      additional property: Loudness (dB)
        type: PropertyValue
        value: -8.158
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: .Existence
  type: MusicAlbum
  date published: 2018-02-21
album: Pain and Other Pleasures
  type: MusicAlbum
  date published: 2019-09-20
album: Elegant Demise
  type: MusicAlbum
  date published: 2022-02-25
album: Void Moments of Inertia
  type: MusicAlbum
  date published: 2022-03-18