Jack Curley (July 4, 1876 - July 12, 1937), born Jacques Armand Schuel, was a sports promoter of the early 1900s. He managed several high-profile boxing events around the turn-of-the-century and he a
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 0xc499bd2579e26ddf102cecb7a7c68e0a1d55c9caf672391f4f3ab0c8dd9f784d. 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/cd892cb4-1315-46c3-a3d2-14a144b6aef3.json and https://artists.proofprofile.net/proofs/artist/cd892cb4-1315-46c3-a3d2-14a144b6aef3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).