Big K may refer to: Kuhn's-Big K, southeast American department store chain, sold out to Wal-Mart in 1981 A larger store format of Kmart A store brand used by Kroger (and subsidiaries) for soft dr
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 0x4e1b501571398e47ff644e3ce48e9ec02cc1f0c24cfd9f01ad5fa2e5fb13847d. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeae4c0d-e5b7-431b-804c-7c0c16e317ff.json and https://artists.proofprofile.net/proofs/artist/aeae4c0d-e5b7-431b-804c-7c0c16e317ff.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).