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 0x7c2b99253e254070b51e409af0dec6dac2d51bad930cfe2dda76a91bf9d2822e. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5d1b221-ec43-48a6-9614-cfffefd396cb.json and https://artists.proofprofile.net/proofs/artist/d5d1b221-ec43-48a6-9614-cfffefd396cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tachafaa Ya Rassoul Lah Fina تشفع يا رسول الله فينا
Musée Virtuel Tlemcen (Bande Sonore Originale)