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type: MusicGroup
description: upright=1.15|thumb|King Wenceslaus II, crowned King of Poland in 1300, from the Codex Manesse (14th century) upright=1.15|thumb|Territory under control of Wenceslaus II of the Přemyslid dynasty (c. 13
popularity: 7
followers: 7
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additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6610913c215891c037742a09b05e30e5738ec7f46a7c2feed6b6ad389c4dd3. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7602336-f4eb-40d9-8b36-d9e8d2e70bc6.json and https://artists.proofprofile.net/proofs/artist/b7602336-f4eb-40d9-8b36-d9e8d2e70bc6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T17:48:00Z
track: Vampire - 1300 Remix

Vampire - 1300 Remix
type: MusicRecording
duration: PT3M26S
duration ms: 206333
explicit: false
by artist: Payday
by artist: 1300
by artist: Danny Brown
in album: Vampire (1300 Remix)
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  date published: 2021-11-05
isrc code: GBKPL2166615
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additional property: OTSTimestamp
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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
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e310512ce3c888d18306e37b1cfc2d057fc8e6e33cc92dbcb612c2988dbabe. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKPL2166615.
  date published: 2026-06-13T17:25:41Z
audio: Vampire - 1300 Remix
  type: AudioObject
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