David Leach
type: MusicGroup
description: David Leach may refer to: David Leach (potter) (1911–2005), English studio potter David Leach (admiral) (1928–2020), Royal Australian Navy officer David Leach (activist) (born 1945), Des Moines an
popularity: 5
followers: 5
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x26f0e4f9e61f2fb77df64b588e825a357adbd2607e7836d495dbc0b03a6e0690
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954130
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954130
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7c5ed82c-c6c2-43c9-84f7-f2343af9066b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/7c5ed82c-c6c2-43c9-84f7-f2343af9066b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/7c5ed82c-c6c2-43c9-84f7-f2343af9066b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T19:07:14Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x26f0e4f9e61f2fb77df64b588e825a357adbd2607e7836d495dbc0b03a6e0690","name":"David Leach","registered_at":"2026-06-17T08:56:28Z","symbol":"NIM1345027","token_address":"0x0c5236d4f78d22be7d62c235ebf5fbbcb5ed0492","type":"artist","uuid":"7c5ed82c-c6c2-43c9-84f7-f2343af9066b"}
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 0x26f0e4f9e61f2fb77df64b588e825a357adbd2607e7836d495dbc0b03a6e0690. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c5ed82c-c6c2-43c9-84f7-f2343af9066b.json and https://artists.proofprofile.net/proofs/artist/7c5ed82c-c6c2-43c9-84f7-f2343af9066b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T19:07:14Z
  text: {"copyright_id":"0x26f0e4f9e61f2fb77df64b588e825a357adbd2607e7836d495dbc0b03a6e0690","name":"David Leach","registered_at":"2026-06-17T08:56:28Z","symbol":"NIM1345027","token_address":"0x0c5236d4f78d22be7d62c235ebf5fbbcb5ed0492","type":"artist","uuid":"7c5ed82c-c6c2-43c9-84f7-f2343af9066b"}