Fort Apache may refer to: Arts and entertainment Fort Apache (film), a 1948 John Ford film starring John Wayne Fort Apache, The Bronx (film), a 1981 crime drama film starring Paul Newman Fort Apac
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 0x5cb3db4f27e3a170061f101c853115dd77a8385bd7cb3b99e6258f7dabfe584a. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e4086dda-e0b5-49c9-8b8c-633b3fbfaed3.json and https://artists.proofprofile.net/proofs/artist/e4086dda-e0b5-49c9-8b8c-633b3fbfaed3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).