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 0xc1039543488fb2ce63f96db616416caec67cc01cc4d0c55e3a8e6430b5692561. 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/6515dd56-a67c-4f3c-ba97-63a44e16cb03.json and https://artists.proofprofile.net/proofs/artist/6515dd56-a67c-4f3c-ba97-63a44e16cb03.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Big Band Jazz Ballad - Music for Cozy Thunderstorms
Festive Trumpet Bossa - Background for Calm April Days
Trumpet Bossa - Ambiance for Resting Aprils
Backdrop for Daily Positivity - Chilled Soprano Sax Solo
Music for Daily Positivity - Cultivated Soprano Sax Solo
Quartet Jazz - Bgm for Seasonal Horizons
Music for Calming Evening Relax (Chill Out)
High-class Music for At Home and Relaxing - Chill Out
Jazz Violin - Ambiance for Relaxed Sunday Nite
Spectacular Quartet Jazz - Ambiance for Stress Free Tracks
Soprano Sax Solo - Music for Stress Free Tracks
Soft Jazz Piano: Piano Melodies for Relaxation and Sleep
Smooth Jazz Piano and Pups: Jazzing Up the Dog House
ジャズ音楽で植物をリラックスさせる
Purrfect Jazz Reverie: Coffee Lounge Serenades for Cats
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f492f1f26cabcc959b294620a3490641ca9771122ff17f047c772c5cf3cd37. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZL9X5864816.