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 0x63c1a403cd9f47839f6bdfc164ca23e8225f2355c6c6456615540fbcb956d634. 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/c25670b8-7fd1-43e8-b416-89964a207417.json and https://artists.proofprofile.net/proofs/artist/c25670b8-7fd1-43e8-b416-89964a207417.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jazz Piano - Ambiance for Walks Through the Park
Ballad Jazz - Background Music for Refreshing Spring
(Jazz Ballad) Music for Cooking Together
Breathtaking Trumpet Solo - Background for Fresh Cooking at Home
Playful Background Music for Cafes and Classics
Amazing Music for Coffee House Mornings - Jazz Quintet
パウジティブリー・リラクシング