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 0x1553e1c58638ccebaf9715e5df4ccc5650c6d30fcc2df5154dfa7f9a2a2d2245. Chain 2 (Bitcoin): anchored in block 954097 (2026-06-17T13:13:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ad8978f-2858-44bf-ae62-245a486b5031.json and https://artists.proofprofile.net/proofs/artist/7ad8978f-2858-44bf-ae62-245a486b5031.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vocal Recital: Lenero, Carmen - Diaz, M. / Perez, A. / Lenero, C. (The Perspective of the Cat)