Petr Poláček
type: MusicGroup
popularity: 12
followers: 649
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6bdc23447b9a726dca8ca4684f49bbc6e2004cb8b7734888742733ad3ab75cad
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953762
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953762
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ba3aade7-bb38-4f05-a886-1f7ca69fdbf3.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/ba3aade7-bb38-4f05-a886-1f7ca69fdbf3.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/ba3aade7-bb38-4f05-a886-1f7ca69fdbf3
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T08:21:23Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6bdc23447b9a726dca8ca4684f49bbc6e2004cb8b7734888742733ad3ab75cad","name":"Petr Poláček","registered_at":"2026-06-14T23:59:58Z","symbol":"NIM0617968","token_address":"0x576ef53c43e5e243dc6f07d4c1c3fbbb10f1b4aa","type":"artist","uuid":"ba3aade7-bb38-4f05-a886-1f7ca69fdbf3"}
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 0x6bdc23447b9a726dca8ca4684f49bbc6e2004cb8b7734888742733ad3ab75cad. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba3aade7-bb38-4f05-a886-1f7ca69fdbf3.json and https://artists.proofprofile.net/proofs/artist/ba3aade7-bb38-4f05-a886-1f7ca69fdbf3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T09:50:11Z
  text: {"copyright_id":"0x6bdc23447b9a726dca8ca4684f49bbc6e2004cb8b7734888742733ad3ab75cad","name":"Petr Poláček","registered_at":"2026-06-14T23:59:58Z","symbol":"NIM0617968","token_address":"0x576ef53c43e5e243dc6f07d4c1c3fbbb10f1b4aa","type":"artist","uuid":"ba3aade7-bb38-4f05-a886-1f7ca69fdbf3"}
album: Petr Poláček & Iluze
  type: MusicAlbum
  date published: 2005-03-07
album: Petr Poláček & Iluze
  type: MusicAlbum
  date published: 2005-03-07
album: Nemůžu zapomenout
  type: MusicAlbum
  date published: 2007-01-01
album: Nemůžu Zapomenout
  type: MusicAlbum
  date published: 2007-01-15
track: Srdce Prodávám

Srdce Prodávám
type: MusicRecording
duration: PT4M10S
duration ms: 250000
explicit: false
by artist: Petr Poláček
by artist: Iluze
in album: Hit Album
  type: MusicAlbum
  date published: 2008-06-30
popularity: 1
isrc code: CZA540571509
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
  type: PropertyValue
  value: 2026-07-07T16:33:07+00:00
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x37f050ce72064c64c3ad4e3f48ddafc0f03f2090118a550ea1320ecd804a8d43
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 957118
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/957118
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CZA540571509
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19Z
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
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 957118
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f050ce72064c64c3ad4e3f48ddafc0f03f2090118a550ea1320ecd804a8d43. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CZA540571509.
  date published: 2026-07-08T03:20:19Z
audio: Srdce Prodávám
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 139.664
  additional property: Musical Key
    type: PropertyValue
    value: 0
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.533
  additional property: Energy
    type: PropertyValue
    value: 0.524
  additional property: Speechiness
    type: PropertyValue
    value: 0.033
  additional property: Acousticness
    type: PropertyValue
    value: 0.434
  additional property: Instrumentalness
    type: PropertyValue
    value: 0
  additional property: Liveness
    type: PropertyValue
    value: 0.258
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.298
  additional property: Loudness (dB)
    type: PropertyValue
    value: -10.82
  additional property: Key Name
    type: PropertyValue
    value: C
  additional property: Mode Name
    type: PropertyValue
    value: Major