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 0x8770a432beea7fb55bd50be9016c0e2a0918cb758280a84f64a542f29b452c17. Chain 2 (Bitcoin): anchored in block 954729 (2026-06-21T18:16:07Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fac7dd6b-95d6-486e-a331-d8cd5e226d76.json and https://artists.proofprofile.net/proofs/artist/fac7dd6b-95d6-486e-a331-d8cd5e226d76.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
أغاني تعليمية، الجزء الثاني - المهن و الحركة
أغاني تعليمية، الجزء الأول - الحيوانات، الألوان و العد!