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 0x62cb4d4b6b67f48ecbd2f6474dcab9dc8bd93eafb5002e16c7d08e29638671da. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d3eb8ad-7cb3-47b9-82ee-2f6d0025456d.json and https://artists.proofprofile.net/proofs/artist/7d3eb8ad-7cb3-47b9-82ee-2f6d0025456d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Trio Madjesi, Orchestre Sosoliso - , Vol. 2