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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68785747be5a16179c21de98652c262d5b8970f52dba1aa8c632ebec26b420fc. Chain 2 (Bitcoin): anchored in block 954603 (2026-06-20T21:47:54Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0c5f89a-4bc7-4ed1-89ab-58a1ff36ddb5.json and https://artists.proofprofile.net/proofs/artist/c0c5f89a-4bc7-4ed1-89ab-58a1ff36ddb5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Heavenly Piano: Inspirational Solo Piano Music
Silent Night: Carols for a Quiet Christmas Eve
Silent Night; Vol. 2: More Carols for a Quiet Christmas Eve