John Day, John Daye or Jon Day may refer to: People Politicians John Day (Nova Scotia legislator) (died 1775), merchant and politician in Nova Scotia John Day Jr. (died 1792), soldier and political
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8081baa4ebf1f6f1b94022c78e5bc321f518e82d81aa3727a74cf03474b5b4d6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1aa7d143-1475-4e71-a8f8-995423819236.json and https://artists.proofprofile.net/proofs/artist/1aa7d143-1475-4e71-a8f8-995423819236.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).