thumb|240px|KC Groves with Uncle Earl at Kult, Niederstetten, 2010 Katherine "KC" Groves (born 14 March 1971) is an American mandolin player and singer specializing in old-time music and bluegrass. Sh
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6927ed67fff26a9b459650fe773f0b55939bd291e6d61261f1bdbdb4b9cad5. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7cd93bac-803b-4796-a8b6-f18c06a466de.json and https://artists.proofprofile.net/proofs/artist/7cd93bac-803b-4796-a8b6-f18c06a466de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).