MMC
type: MusicGroup
description: MMC may stand for: Business Mail.com Media Corp,, now Penske Media Corporation Marsh McLennan, an American-based global professional services firm Master Municipal Clerk, a certification in the US f
popularity: 5
followers: 356
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x41952e49abef644ba479063d273653f7c0e9a33ae6246b4e341928f6b0b1cb42
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4c88e8c9-2c7c-4730-8a9d-e582211020d8.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4c88e8c9-2c7c-4730-8a9d-e582211020d8.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4c88e8c9-2c7c-4730-8a9d-e582211020d8
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
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 0x41952e49abef644ba479063d273653f7c0e9a33ae6246b4e341928f6b0b1cb42. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4c88e8c9-2c7c-4730-8a9d-e582211020d8.json and https://artists.proofprofile.net/proofs/artist/4c88e8c9-2c7c-4730-8a9d-e582211020d8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
album: 2020
  type: MusicAlbum
  date published: 2020-11-06
album: 2021
  type: MusicAlbum
  date published: 2021-11-07
album: 2022
  type: MusicAlbum
  date published: 2022-11-25
album: 2023
  type: MusicAlbum
  date published: 2023-11-03
album: 2024: Live At Studio 11b
  type: MusicAlbum
  date published: 2024-12-04