Jeffy is a masculine given name, a variation of Jeffrey, which may refer to: A child character in the syndicated comic strip The Family Circus A character in the 2003 novel The Devil Wears Prada J
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 0x7642af7f706c419b65beb82f95c6d31ec410a41e1a42eae8bb1eaa634b8e97ba. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f23d2213-1590-47b1-937c-8e30909cbd17.json and https://artists.proofprofile.net/proofs/artist/f23d2213-1590-47b1-937c-8e30909cbd17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).