John H. Corcoran (May 15, 1858 – December 28, 1935), was an American catcher in Major League Baseball who played for the Brooklyn Atlantics during the season. This was his only season in the Majors.
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 0x9e72be7b51df0c31781c3eff9736c25f0a7c2dc8f94fe05971582da3b4b662c7. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cb5f608b-50f6-4627-b291-a94914f27652.json and https://artists.proofprofile.net/proofs/artist/cb5f608b-50f6-4627-b291-a94914f27652.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).