Mark & Porko
type: MusicGroup
popularity: 4
followers: 242
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x429ccaa7c61db70cec75cf3d32586e0fd1360f0c3f92df3f5866ea22128f75ad
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/53b59fe4-a0b7-410a-9815-2c4609101337.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/53b59fe4-a0b7-410a-9815-2c4609101337.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/53b59fe4-a0b7-410a-9815-2c4609101337
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x429ccaa7c61db70cec75cf3d32586e0fd1360f0c3f92df3f5866ea22128f75ad","name":"Mark & Porko","registered_at":"2026-06-16T18:42:59Z","symbol":"NIM1141423","token_address":"0x29ed995687dff50671a86ad48db0c90513a73abb","type":"artist","uuid":"53b59fe4-a0b7-410a-9815-2c4609101337"}
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 0x429ccaa7c61db70cec75cf3d32586e0fd1360f0c3f92df3f5866ea22128f75ad. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/53b59fe4-a0b7-410a-9815-2c4609101337.json and https://artists.proofprofile.net/proofs/artist/53b59fe4-a0b7-410a-9815-2c4609101337.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x429ccaa7c61db70cec75cf3d32586e0fd1360f0c3f92df3f5866ea22128f75ad","name":"Mark & Porko","registered_at":"2026-06-16T18:42:59Z","symbol":"NIM1141423","token_address":"0x29ed995687dff50671a86ad48db0c90513a73abb","type":"artist","uuid":"53b59fe4-a0b7-410a-9815-2c4609101337"}
album: Lördagkväll ikväll (schmack om dooda)
  type: MusicAlbum
  date published: 2013-05-07
  track: Lördagkväll ikväll (schmack om dooda)
    type: MusicRecording
    duration: PT3M0S
    duration ms: 180405
    explicit: false
    by artist: Mark & Porko
    in album: Lördagkväll ikväll (schmack om dooda)
      type: MusicAlbum
      date published: 2013-05-07
    isrc code: SEYOK1308843
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T17:06:42+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0xaf373b88b1cb46e49b098836892b8d79a2c9a5e9273d37a83c8da0df7a7b3043
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958590
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958590
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEYOK1308843
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-18T17:28:56Z
    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 0xaf373b88b1cb46e49b098836892b8d79a2c9a5e9273d37a83c8da0df7a7b3043. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/SEYOK1308843.
      date published: 2026-07-18T17:28:56Z
    audio: Lördagkväll ikväll (schmack om dooda)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 112.03
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.72
      additional property: Energy
        type: PropertyValue
        value: 0.614
      additional property: Speechiness
        type: PropertyValue
        value: 0.047
      additional property: Acousticness
        type: PropertyValue
        value: 0.046
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.123
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.88
      additional property: Loudness (dB)
        type: PropertyValue
        value: -6.507
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Ingenting står i vår väg (rock om dooda)
  type: MusicAlbum
  date published: 2015-03-04
album: Lethrandir
  type: MusicAlbum
  date published: 2016-10-25
album: Synd att ingen följer med
  type: MusicAlbum
  date published: 2017-02-28
album: Kära tomten
  type: MusicAlbum
  date published: 2017-12-03
album: Fyra sagor och lilla snigel
  type: MusicAlbum
  date published: 2018-03-08