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 0xabcf780059e18159b9a4675b91b319ecf7ebdcc7d8e7456048cc6b95a214699d. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/75d8bfa2-143d-4596-ab82-59f191de44fc.json and https://artists.proofprofile.net/proofs/artist/75d8bfa2-143d-4596-ab82-59f191de44fc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Chansons educatives Vol. 1: Des airs de grammaire
Character Building Songs : Unison, Rounds and Partner Songs
Bilingual Songs: English-Spanish, vol. 3
Bilingual Songs: English-Spanish, vol. 4
Bilingual Songs: English-Mandarin Chinese, vol. 1
Multiplica cantando (Multiplication Songs in Spanish)
Suma cantando (Addition Songs in Spanish)
Canciones temáticas para aprender idiomas
Chanson thématiques pour apprendre la langue, vol. 1
Divide cantando (Division Songs in Spanish)
Resta cantando (Subtraction Songs in Spanish)
Bilingual Songs: English-Mandarin Chinese, Vol. 2