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 0x5f9b10ce37a5b8080a5710da8f8443e20fac37b8e946244b5173a251ddbc449e. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f2d17c5-d4de-4aa4-a35b-e3fe8d9332f1.json and https://artists.proofprofile.net/proofs/artist/2f2d17c5-d4de-4aa4-a35b-e3fe8d9332f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mind-blowing Music for Coffee Dates - Trumpet Jazz
(Tenor Sax and Trumpet Solos) Music for Relaxing Cafes
Dream-Like Tenor Sax Jazz - Background for Dinner Time
Classic Music for Date Nights - Trumpet Jazz
Deluxe Tenor Sax Jazz - Background for Date Nights
Mysterious Trio Jazz - Bgm for Date Nights
Music for Daily Routines - Big Band Ballad with Guitar
Big Band Jazz Ballad - Music for Daily Routines
Quiet Big Band Ballad with Vibraphone - Background for Positive Moods
Backdrop for Morning Inspiration - Classic Big Band Ballad with Guitar
Music for Holiday Memories - Lively Piano
Latin Big Band - Background for Downing Espresso
Glorious Cuban Big Band - Bgm for Espresso Jolts
Music for Waking Up with Coffee (Bolero)
Tenor Sax Solo - Music for Lunch with Co Workers
Music for Dinner with Co Workers - Sunny Soprano Sax Solo
セルフサービスのカフェの雰囲気
Smooth Productivity: Jazz Lounge for Effective Work
Sweet Dreams: Jazz Piano Lullabies for Baby Sleep