Benjamin B. Cunningham (April 1, 1874CUNNINGHAM, Benjamin B., in Who's Who in America (14th edition, 1926); p. 543– January 2, 1946),"Death Takes Cunningham, Ex-Justice, 71", Rochester Democrat and Ch
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 0xe221f698bd46d69c50c2e38059e745a233a2972717d2bf7df67d08ee5d9c8975. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec2642a4-cf39-46ea-bfda-3c3d0820e32d.json and https://artists.proofprofile.net/proofs/artist/ec2642a4-cf39-46ea-bfda-3c3d0820e32d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).