Milton Bradley
type: MusicGroup
description: Milton Bradley (November 8, 1836 – May 30, 1911) was an American business magnate, game pioneer and publisher, credited by many with launching the board game industry, with his eponymous enterprise, w
popularity: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7b2c1201a4c83a8966a6f18ff047580a9420479a5cccd445a3eb7846e8092c5c
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954097
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954097
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7b0b538b-f9c1-4251-b749-1586af6be03e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7b0b538b-f9c1-4251-b749-1586af6be03e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7b0b538b-f9c1-4251-b749-1586af6be03e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T13:13:51Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7b2c1201a4c83a8966a6f18ff047580a9420479a5cccd445a3eb7846e8092c5c","name":"Milton Bradley","registered_at":"2026-06-17T08:33:03Z","symbol":"NIM1339446","token_address":"0x81289984e23d608018dcfbad5df0a42b4fcc1349","type":"artist","uuid":"7b0b538b-f9c1-4251-b749-1586af6be03e"}
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 0x7b2c1201a4c83a8966a6f18ff047580a9420479a5cccd445a3eb7846e8092c5c. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7b0b538b-f9c1-4251-b749-1586af6be03e.json and https://artists.proofprofile.net/proofs/artist/7b0b538b-f9c1-4251-b749-1586af6be03e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T13:13:51Z
  text: {"copyright_id":"0x7b2c1201a4c83a8966a6f18ff047580a9420479a5cccd445a3eb7846e8092c5c","name":"Milton Bradley","registered_at":"2026-06-17T08:33:03Z","symbol":"NIM1339446","token_address":"0x81289984e23d608018dcfbad5df0a42b4fcc1349","type":"artist","uuid":"7b0b538b-f9c1-4251-b749-1586af6be03e"}