Fero or Feró is a given name and family name, and may refer to: Given name Fero Fero is a nickname for Ferario and František: Ferario Spasov (born 1962), Bulgarian football coach and manager Fer
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 0x2834d6443823e4eea4dca5edd481f0a885612a392c8d86c8fef89abbf001d436. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe27b6e7-7f35-43e5-aa2e-4f61bbad993a.json and https://artists.proofprofile.net/proofs/artist/fe27b6e7-7f35-43e5-aa2e-4f61bbad993a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).