Kat Marsh
type: MusicGroup
genre: neo soul
genre: post-grunge
popularity: 22
followers: 220
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xe522a08df73f13f3f45ac3e447301bcbf6087de1d910958f3e48ecf21814743f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0fa71da0-acc1-4773-b30e-463238bf54fc.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0fa71da0-acc1-4773-b30e-463238bf54fc.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0fa71da0-acc1-4773-b30e-463238bf54fc
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xe522a08df73f13f3f45ac3e447301bcbf6087de1d910958f3e48ecf21814743f","name":"Kat Marsh","registered_at":"2026-06-11T11:57:45Z","symbol":"NIM0021013","token_address":"0xed5c09262264f26d9cff96fc841e16f496221f6d","type":"artist","uuid":"0fa71da0-acc1-4773-b30e-463238bf54fc"}
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 0xe522a08df73f13f3f45ac3e447301bcbf6087de1d910958f3e48ecf21814743f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fa71da0-acc1-4773-b30e-463238bf54fc.json and https://artists.proofprofile.net/proofs/artist/0fa71da0-acc1-4773-b30e-463238bf54fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T21:20:00Z
  text: {"copyright_id":"0xe522a08df73f13f3f45ac3e447301bcbf6087de1d910958f3e48ecf21814743f","name":"Kat Marsh","registered_at":"2026-06-11T11:57:45Z","symbol":"NIM0021013","token_address":"0xed5c09262264f26d9cff96fc841e16f496221f6d","type":"artist","uuid":"0fa71da0-acc1-4773-b30e-463238bf54fc"}
album: Hunted (Live)
  type: MusicAlbum
  date published: 2010-12-03