Marcel
type: MusicGroup
description: Marcel may refer to: People Marcel (given name), people with the given name Marcel Marcel (footballer, born August 1981), Marcel Silva Andrade, Brazilian midfielder Marcel (footballer, born Novemb
popularity: 8
followers: 69
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x9bbcd5a4259008f4ad4899059a000da9e8abd3c1491394c15263c06db7ce6da7
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954017
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954017
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/354c6237-256a-4afe-ac83-f9a4c8ea0e44.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/354c6237-256a-4afe-ac83-f9a4c8ea0e44.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/354c6237-256a-4afe-ac83-f9a4c8ea0e44
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T23:38:33Z
additional property: OTSCanonicalRecord
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 0x9bbcd5a4259008f4ad4899059a000da9e8abd3c1491394c15263c06db7ce6da7. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/354c6237-256a-4afe-ac83-f9a4c8ea0e44.json and https://artists.proofprofile.net/proofs/artist/354c6237-256a-4afe-ac83-f9a4c8ea0e44.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T23:38:33Z
album: Shadows
  type: MusicAlbum
  date published: 2024-12-19
album: Fields of Imagination
  type: MusicAlbum
  date published: 2024-12-22
album: Lost in Echoes
  type: MusicAlbum
  date published: 2025-01-06
  track: Perfectly imperfect love
    type: MusicRecording
    duration: PT3M27S
    duration ms: 207159
    explicit: false
    by artist: Marcel
    in album: Lost in Echoes
      type: MusicAlbum
      date published: 2025-01-06
    isrc code: CAHQJ2514289
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T16:41:18+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5cc77832a15f74c684cb46c0efcea81953c8f106107fe5e0c790149e2ca130b0
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958176
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958176
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CAHQJ2514289
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T17:14:36Z
    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 0x5cc77832a15f74c684cb46c0efcea81953c8f106107fe5e0c790149e2ca130b0. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/CAHQJ2514289.
      date published: 2026-07-15T17:14:36Z
    audio: Perfectly imperfect love
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 137.018
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.583
      additional property: Energy
        type: PropertyValue
        value: 0.561
      additional property: Speechiness
        type: PropertyValue
        value: 0.034
      additional property: Acousticness
        type: PropertyValue
        value: 0.01
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.162
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.315
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.655
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Lost in Echoes
  type: MusicAlbum
  date published: 2025-02-11