Dora Carr was an American musician, best known for her work in the early and mid-1920s with pianist and arranger Cow Cow Davenport. Carr is best remembered for the song "Cow Cow Blues" and playing boo
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 0x5c6d7c9fdf0ff67de007e0e2a9621b9023c27860055e99cc68b97554e61cb618. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28977815-2488-4e44-9368-1f51d39c68e6.json and https://artists.proofprofile.net/proofs/artist/28977815-2488-4e44-9368-1f51d39c68e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).