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 0x776505328b73a87ff36483704ed379c6ebdeec0cd1fb353e33e18848b255046a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/418a0855-24e6-4c50-8841-3b2dea1986bb.json and https://artists.proofprofile.net/proofs/artist/418a0855-24e6-4c50-8841-3b2dea1986bb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Song and Dance Man: Popular American Song Hits 1913-1928 With Don Meehan and the Dave Carey Orchestra