Katharina Mayer
type: MusicGroup
popularity: 4
followers: 1
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x72105e478fb0d7a5a48486d6a57d255bfc4bc6221e028579a5ad570d8a91577c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953895
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953895
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0f1ed4a0-acbc-4b15-8350-92d36174dae8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0f1ed4a0-acbc-4b15-8350-92d36174dae8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0f1ed4a0-acbc-4b15-8350-92d36174dae8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T05:46:35Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x72105e478fb0d7a5a48486d6a57d255bfc4bc6221e028579a5ad570d8a91577c","name":"Katharina Mayer","registered_at":"2026-06-15T18:52:49Z","symbol":"NIM0800087","token_address":"0xbb4c45e254a50b0e56fd681d79ceb7e9d7f298d1","type":"artist","uuid":"0f1ed4a0-acbc-4b15-8350-92d36174dae8"}
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 0x72105e478fb0d7a5a48486d6a57d255bfc4bc6221e028579a5ad570d8a91577c. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f1ed4a0-acbc-4b15-8350-92d36174dae8.json and https://artists.proofprofile.net/proofs/artist/0f1ed4a0-acbc-4b15-8350-92d36174dae8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T13:28:01Z
  text: {"copyright_id":"0x72105e478fb0d7a5a48486d6a57d255bfc4bc6221e028579a5ad570d8a91577c","name":"Katharina Mayer","registered_at":"2026-06-15T18:52:49Z","symbol":"NIM0800087","token_address":"0xbb4c45e254a50b0e56fd681d79ceb7e9d7f298d1","type":"artist","uuid":"0f1ed4a0-acbc-4b15-8350-92d36174dae8"}
album: Misty Valley Path
  type: MusicAlbum
  date published: 2024-10-05
  track: Misty Valley Path
    type: MusicRecording
    duration: PT4M0S
    duration ms: 240000
    explicit: false
    by artist: Katharina Mayer
    in album: Misty Valley Path
      type: MusicAlbum
      date published: 2024-10-05
    isrc code: QT2VB2439328
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-15T17:19:50+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x37f2899e9a097d5d98c6e3351c50ea548eecf58fd9839146896d78b5964535bd
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958180
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958180
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT2VB2439328
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-15T20:21:17Z
    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 0x37f2899e9a097d5d98c6e3351c50ea548eecf58fd9839146896d78b5964535bd. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:21:17Z), 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/QT2VB2439328.
      date published: 2026-07-15T20:21:17Z
    audio: Misty Valley Path
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 168.069
      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: 0.439
      additional property: Energy
        type: PropertyValue
        value: 0.074
      additional property: Speechiness
        type: PropertyValue
        value: 0.051
      additional property: Acousticness
        type: PropertyValue
        value: 0.987
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.952
      additional property: Liveness
        type: PropertyValue
        value: 0.114
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.13
      additional property: Loudness (dB)
        type: PropertyValue
        value: -24.043
      additional property: Key Name
        type: PropertyValue
        value: C
      additional property: Mode Name
        type: PropertyValue
        value: Major