Cold Union
type: MusicGroup
genre: cold wave
genre: darkwave
genre: deathrock
genre: post-punk
popularity: 4
followers: 407
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xdcc2e41a6ec589b5053627f346168a8ee71532de68bd81dd7da38f0c95ae3ac0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953997
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953997
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/251aec9b-b0b7-4f18-989b-d7c94ada8b60.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/251aec9b-b0b7-4f18-989b-d7c94ada8b60.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/251aec9b-b0b7-4f18-989b-d7c94ada8b60
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T20:07:57Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xdcc2e41a6ec589b5053627f346168a8ee71532de68bd81dd7da38f0c95ae3ac0","name":"Cold Union","registered_at":"2026-06-16T02:24:30Z","symbol":"NIM0907888","token_address":"0x2d3edb9e0dc482cf36a17ddb0e07325a74841729","type":"artist","uuid":"251aec9b-b0b7-4f18-989b-d7c94ada8b60"}
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 0xdcc2e41a6ec589b5053627f346168a8ee71532de68bd81dd7da38f0c95ae3ac0. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/251aec9b-b0b7-4f18-989b-d7c94ada8b60.json and https://artists.proofprofile.net/proofs/artist/251aec9b-b0b7-4f18-989b-d7c94ada8b60.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:07:57Z
  text: {"copyright_id":"0xdcc2e41a6ec589b5053627f346168a8ee71532de68bd81dd7da38f0c95ae3ac0","name":"Cold Union","registered_at":"2026-06-16T02:24:30Z","symbol":"NIM0907888","token_address":"0x2d3edb9e0dc482cf36a17ddb0e07325a74841729","type":"artist","uuid":"251aec9b-b0b7-4f18-989b-d7c94ada8b60"}
album: Glaciers Walk
  type: MusicAlbum
  date published: 2022-09-13
album: Neverending Grey
  type: MusicAlbum
  date published: 2023-11-29
album: Deep in My Memory
  type: MusicAlbum
  date published: 2024-05-13
album: Black On The Other Side
  type: MusicAlbum
  date published: 2025-04-26