Katharine Whalen is a musician, singer, and songwriter originally from Greenville, North Carolina. She contributed vocals, banjo, and ukulele as a member of the Chapel Hill jazz band Squirrel Nut Zipp
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 0x0e12b608800877189cfb04a61d2ff712055942781ba914e957c5924291965854. 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/4003b1ec-8d77-4ea5-9e61-366e78c31ba0.json and https://artists.proofprofile.net/proofs/artist/4003b1ec-8d77-4ea5-9e61-366e78c31ba0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).