John Spring
type: MusicGroup
description: Sir John Spring may refer to: John Spring (MP for Northampton), in 1399 MP for Northampton Sir John Spring of Lavenham (died 1547), English merchant and politician Sir John Spring, 5th Baronet (1674–
popularity: 4
followers: 245
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x6b636febc5b766473d1042c23f7e394d5c4c2f871573c6dad04b348f2498ea63
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5b3c908c-983c-4b92-8c2a-d55c9b06fa69.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/5b3c908c-983c-4b92-8c2a-d55c9b06fa69.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/5b3c908c-983c-4b92-8c2a-d55c9b06fa69
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x6b636febc5b766473d1042c23f7e394d5c4c2f871573c6dad04b348f2498ea63","name":"John Spring","registered_at":"2026-06-16T21:18:30Z","symbol":"NIM1178543","token_address":"0x7dc6630d8f26092a810ec630bf0da7876e11a417","type":"artist","uuid":"5b3c908c-983c-4b92-8c2a-d55c9b06fa69"}
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 0x6b636febc5b766473d1042c23f7e394d5c4c2f871573c6dad04b348f2498ea63. 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/5b3c908c-983c-4b92-8c2a-d55c9b06fa69.json and https://artists.proofprofile.net/proofs/artist/5b3c908c-983c-4b92-8c2a-d55c9b06fa69.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x6b636febc5b766473d1042c23f7e394d5c4c2f871573c6dad04b348f2498ea63","name":"John Spring","registered_at":"2026-06-16T21:18:30Z","symbol":"NIM1178543","token_address":"0x7dc6630d8f26092a810ec630bf0da7876e11a417","type":"artist","uuid":"5b3c908c-983c-4b92-8c2a-d55c9b06fa69"}
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