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 0xa00052c9bf29155a02a7a0798fa25297a6861b5f065fcad64b676297ddbca73f. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/502e6b27-e971-4b71-a886-aa4e2f3dce34.json and https://artists.proofprofile.net/proofs/artist/502e6b27-e971-4b71-a886-aa4e2f3dce34.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Glinka: Ruslan and Lyudmila / Strauss, R.: Horn Concerto No. 1 / Tchaikovsky: Symphony No. 5