Picture Postcard
type: MusicGroup
genre: shoegaze
popularity: 5
followers: 76
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x1f5ef9492e6d739e37c6b43e38e5c156aea5fedc4dec64bf522ef34572d54bdd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953888
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953888
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0e0213c9-6e61-4b14-a280-f6aa40f81089.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0e0213c9-6e61-4b14-a280-f6aa40f81089.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0e0213c9-6e61-4b14-a280-f6aa40f81089
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T04:55:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x1f5ef9492e6d739e37c6b43e38e5c156aea5fedc4dec64bf522ef34572d54bdd","name":"Picture Postcard","registered_at":"2026-06-15T18:28:59Z","symbol":"NIM0794409","token_address":"0xd5703617c2a8cac738dd09e8bb560fa02e24c797","type":"artist","uuid":"0e0213c9-6e61-4b14-a280-f6aa40f81089"}
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 0x1f5ef9492e6d739e37c6b43e38e5c156aea5fedc4dec64bf522ef34572d54bdd. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e0213c9-6e61-4b14-a280-f6aa40f81089.json and https://artists.proofprofile.net/proofs/artist/0e0213c9-6e61-4b14-a280-f6aa40f81089.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T04:55:23Z
  text: {"copyright_id":"0x1f5ef9492e6d739e37c6b43e38e5c156aea5fedc4dec64bf522ef34572d54bdd","name":"Picture Postcard","registered_at":"2026-06-15T18:28:59Z","symbol":"NIM0794409","token_address":"0xd5703617c2a8cac738dd09e8bb560fa02e24c797","type":"artist","uuid":"0e0213c9-6e61-4b14-a280-f6aa40f81089"}
album: October
  type: MusicAlbum
  date published: 2025-02-28
  track: October
    type: MusicRecording
    duration: PT3M58S
    duration ms: 238551
    explicit: false
    by artist: Picture Postcard
    in album: October
      type: MusicAlbum
      date published: 2025-02-28
    genre: shoegaze
    isrc code: QZES82525860
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-14T21:25:09+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x79757c60a7d0c3cefc173f4804b4ae538b3d2e233d4207fc2128c54fe58d4b45
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958069
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958069
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES82525860
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-14T21:37:55Z
    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 0x79757c60a7d0c3cefc173f4804b4ae538b3d2e233d4207fc2128c54fe58d4b45. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZES82525860.
      date published: 2026-07-14T21:37:55Z
    audio: October
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 144.987
      additional property: Musical Key
        type: PropertyValue
        value: 3
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.335
      additional property: Energy
        type: PropertyValue
        value: 0.89
      additional property: Speechiness
        type: PropertyValue
        value: 0.045
      additional property: Acousticness
        type: PropertyValue
        value: 0
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.96
      additional property: Liveness
        type: PropertyValue
        value: 0.374
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.583
      additional property: Loudness (dB)
        type: PropertyValue
        value: -5.195
      additional property: Key Name
        type: PropertyValue
        value: Eb
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Returning
  type: MusicAlbum
  date published: 2025-05-22