1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 artist was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5005b0b8c4e239eb0760cd3bc88732447febc58ea15347794528e741c5fdb7ad. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3a433335-145b-4bff-8e1e-0df40322ee5e.json and https://artists.proofprofile.net/proofs/artist/3a433335-145b-4bff-8e1e-0df40322ee5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
YUMEverse Ukulele Collection (YUME version)