Feilden may refer to: People Bernard Feilden (1919–2008), British conservation architect Bob Feilden (1917–2004), British mechanical engineer Gerry Feilden (1904–1981), British general and horse r
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 0xcba1863fdb2c9f46293dfcf4e63063bc52cc2b8fe950fcc5ef8d5a3bc8c995a3. Chain 2 (Bitcoin): anchored in block 954017 (2026-06-16T23:38:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35b7bb57-0cfe-46e6-8084-4641c8ae1541.json and https://artists.proofprofile.net/proofs/artist/35b7bb57-0cfe-46e6-8084-4641c8ae1541.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).