Krum
type: MusicGroup
genre: folk pop
description: Krum (, ), often referred to as Krum the Fearsome (c. mid 8th century – 13 April 814) was the Khan of First Bulgarian Empire from sometime between 796 and 803 until his death in 814. During his reign
popularity: 16
followers: 3750
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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  value: https://explorer.copyrightchains.com/tx/0xd6c310490835db6d4ddca460735c3871894d85f1ad77c376c5471e65edffccaf
additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSProofURL
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  value: https://artists.proofprofile.net/proofs/artist/d31df436-79a2-44d6-ba3b-3500c0f4c289.ots
additional property: OTSRecordURL
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  value: https://artists.proofprofile.net/proofs/artist/d31df436-79a2-44d6-ba3b-3500c0f4c289.json
additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T11:57:35Z
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 0xd6c310490835db6d4ddca460735c3871894d85f1ad77c376c5471e65edffccaf. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d31df436-79a2-44d6-ba3b-3500c0f4c289.json and https://artists.proofprofile.net/proofs/artist/d31df436-79a2-44d6-ba3b-3500c0f4c289.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T11:57:35Z
album: Ne si igray s men
  type: MusicAlbum
  date published: 2007
album: Ne Si Igrai S Men
  type: MusicAlbum
  date published: 2007-11-28
album: Ne Drug, A Az
  type: MusicAlbum
  date published: 2009
  track: Zapovyadvam Ti
    type: MusicRecording
    duration: PT3M7S
    duration ms: 187573
    explicit: false
    by artist: Krum
    in album: Ne Drug, A Az
      type: MusicAlbum
      date published: 2009
    genre: folk pop
    isrc code: BGA551100506
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
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    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x98c5550644559bbfc424655e2f8d30f76d15fa705571cfb5db5348c38f22e2c9
    additional property: OTSHash
    additional property: OTSBitcoinBlock
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958690
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BGA551100506
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T07:14:39Z
    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 0x98c5550644559bbfc424655e2f8d30f76d15fa705571cfb5db5348c38f22e2c9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BGA551100506.
      date published: 2026-07-19T07:14:39Z
    audio: Zapovyadvam Ti
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 97.985
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.662
      additional property: Energy
        type: PropertyValue
        value: 0.976
      additional property: Speechiness
        type: PropertyValue
        value: 0.05
      additional property: Acousticness
        type: PropertyValue
        value: 0.276
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.366
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.955
      additional property: Loudness (dB)
        type: PropertyValue
        value: -2.224
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Ne Drug, A Az
  type: MusicAlbum
  date published: 2009-12-15
album: Get Your Groove
  type: MusicAlbum
  date published: 2010-08-23
album: Can't Stop
  type: MusicAlbum
  date published: 2010-11-08
album: Касичка прасе
  type: MusicAlbum
  date published: 2011-11-02
album: Танци-манци
  type: MusicAlbum
  date published: 2011-11-11
album: Vreden
  type: MusicAlbum
  date published: 2012
album: Ще ме търсиш
  type: MusicAlbum
  date published: 2012-06-15
album: Krum - EP
  type: MusicAlbum
  date published: 2013-01-26
album: Djiga, djiga
  type: MusicAlbum
  date published: 2020-07-16
album: Djiga, djiga
  type: MusicAlbum
  date published: 2020-07-16
album: Ey, taka (Djiga)
  type: MusicAlbum
  date published: 2020-07-27
album: Devoyko mari, hubava
  type: MusicAlbum
  date published: 2020-10-12
album: Ako mozheshe
  type: MusicAlbum
  date published: 2021-02-23
album: Ako mozheshe
  type: MusicAlbum
  date published: 2021-02-23
album: Prestani
  type: MusicAlbum
  date published: 2021-07-05
track: Constantine's Penmanship
  type: MusicRecording
  duration: PT2M15S
  duration ms: 135384
  explicit: false
  by artist: Rob Viktum
  by artist: Krum
  by artist: Stik Figa
  in album: Thompson
    type: MusicAlbum
    date published: 2020-11-27
  isrc code: TCAFG2005595
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
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  additional property: CopyrightChainExplorerURL
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    value: https://explorer.copyrightchains.com/tx/0x6d3959b74ef60baf36684458eecfea2d7b9aa41c5bd07955cc025545b3c4f628
  additional property: OTSHash
  additional property: OTSBitcoinBlock
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    value: 960300
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Constantine's Penmanship

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/960300

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAFG2005595

OTSTimestamp
type: PropertyValue
value: 2026-07-30T19:42:40Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3959b74ef60baf36684458eecfea2d7b9aa41c5bd07955cc025545b3c4f628. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/TCAFG2005595.
date published: 2026-07-30T19:42:40Z

Constantine's Penmanship
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 103.079
additional property: Musical Key
  type: PropertyValue
  value: 7
additional property: Mode (Major/Minor)
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  value: 1
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.589
additional property: Energy
  type: PropertyValue
  value: 0.75
additional property: Speechiness
  type: PropertyValue
  value: 0.372
additional property: Acousticness
  type: PropertyValue
  value: 0.034
additional property: Instrumentalness
  type: PropertyValue
  value: 0.004
additional property: Liveness
  type: PropertyValue
  value: 0.164
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.544
additional property: Loudness (dB)
  type: PropertyValue
  value: -11.405
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Major