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 0xc9f7a588380f9c5593e29ffcdc58735bb2a825e7cd11c4b2891d61e0be87624e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90aa9b99-1b61-48b5-872f-2e129443d6a5.json and https://artists.proofprofile.net/proofs/artist/90aa9b99-1b61-48b5-872f-2e129443d6a5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Βυζαντινοί Ύμνοι Εσπερινού, Όρθρου και Θείας Λειτουργίας
Βυζαντινοί Ύμνοι της Αγίας και Μεγάλης Τεσσαρακοστής
Βυζαντινοί Ύμνοι της Λαμπροφόρου Αναστάσεως