Summerfield may refer to: Places United Kingdom Summerfield, Birmingham, a district of Birmingham Summerfield Research Station, a munitions production site near Kidderminster, Worcestershire United
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d997737a5252231baf7636d12ff128eb7481da12d9c22d86c3bbf2304940d8. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41187c9c-69c3-4dd4-9662-455dd00fd3f5.json and https://artists.proofprofile.net/proofs/artist/41187c9c-69c3-4dd4-9662-455dd00fd3f5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).