PERC, Perc or perc may refer to: People Given name Perc Bushby (1919–1975), Australian rules footballer Perc Horne (1890–1990), Australian rugby league footballer Perc Horner (1913–2001), Aust
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 0xdd2357a44c7d1066e8577a968e4920e57669e14764bd742b2ca95f6a2dc90da3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58fe7000-0e82-4858-a760-ed2489017bf6.json and https://artists.proofprofile.net/proofs/artist/58fe7000-0e82-4858-a760-ed2489017bf6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).