Twlv
type: MusicGroup
description: Jo Hyun-soo (; born September 29, 1993), better known by his stage name twlv (, pronounced "twelve"), is a South Korean singer-songwriter and record producer. He began his music career by uploading so
track: DEEP END
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  by artist: Twlv
  in album: Bad Prosecutor (Original Television Soundtrack)
    type: MusicAlbum
    date published: 2022-11-17
  isrc code: KRA252201801
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    value: 2026-07-07T09:18:01Z
  additional property: OTSVerifyInstructions
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    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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38182ae011ab4e76bc593f755d6d015b3c35972d345e807aa956d035c4f01ce8. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/KRA252201801.
    date published: 2026-07-07T09:18:01Z
  audio: DEEP END
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Loudness (dB)
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    additional property: Key Name
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    additional property: Mode Name
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