John Dolmayan
type: MusicGroup
description: Hovig Dolmayan (; born July 15, 1972), better known as John Dolmayan, is an Armenian-American musician, best known as the drummer of System of a Down. He is also the former drummer for Scars on Broadw
popularity: 3
followers: 1523
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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 0xb8cc5444d15323ee9ac49ccfc24b053534f5523ec8ca40dea3847d5e1bb854a6. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d37d883-e423-444b-8092-f28f5756bf83.json and https://artists.proofprofile.net/proofs/artist/9d37d883-e423-444b-8092-f28f5756bf83.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T06:31:18Z
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track: Toxicity - Bonus track

Toxicity - Bonus track
type: MusicRecording
duration: PT2M21S
duration ms: 141382
explicit: false
by artist: John Dolmayan
by artist: Daron Malakian
by artist: Shavarsh Odadjian
by artist: Serj Tankian
by artist: ХОССП / Sgt. Pepper's lonely hearts choir
by artist: Виктория Меликенцова
in album: Проспект Гагарина
  type: MusicAlbum
  date published: 2020-10-11
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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
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:20:19Z
audio: Toxicity - Bonus track
  type: AudioObject
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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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