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 0xca29e3e5f9f4bdb81266d85f667685f6623742a19f14a3c45f57a32e8f8c92c5. Chain 2 (Bitcoin): anchored in block 954580 (2026-06-20T17:48:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7b6afb8-a068-4f66-a14a-1d813e9ff80e.json and https://artists.proofprofile.net/proofs/artist/b7b6afb8-a068-4f66-a14a-1d813e9ff80e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kinderlieder Band 1 (Einfacher!-Geht-Nicht)
Wellerman, ein Shanty Seemannslied erobert das Klassenzimmer (Rhythmusklasse)
Kinderlieder Band 2 (Einfacher!-Geht-Nicht)
Hits & Evergreens (Einfacher!-Geht-Nicht)
Weihnachtslieder (Einfacher!-Geht-Nicht)
Kinderlieder, Weihnachtslieder, Hits & Evergreens in C-Dur (Instrumental Version in C-Dur)