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 0x53dfd3877b0b961da8ce4569133b92583e57287eceef8f49a96620b3c085f2d3. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/135fa9b9-5c5f-442e-a208-ec0e8a67b0a0.json and https://artists.proofprofile.net/proofs/artist/135fa9b9-5c5f-442e-a208-ec0e8a67b0a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cuban Bolero - Music for Waking Up with Coffee
Glorious Music for Morning Caffeine Fix - Bolero
Cuban Bolero - Music for Double Caffeine Fixes
Calm Quartet Jazz - Background for Enjoying Lunch
Quartet Jazz - Background Music for Early Monday Dinner
Music for Dinner with Co Workers - Artistic Soprano Sax Solo
Study & Work: A Relaxing Environment To Focus On The Next Task
Activating Work Mode with Revitalizing Playlists
バー＆ラウンジに最適なジャズミュージック
Piano Harmony: Melodies for Team Collaboration
Harmonious Workday: Music for Work-Life Balance
Ethereal Efforts: Work with Rain Meditation Music
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 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 0x31155984b48a592fdcd1407548f4651feb53e55f0956d9b4fe13726f2df09616. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZZ8B2310236.
Ocean's Academic Calm: Soothing Study Tunes
Work Rhythms: Lofi Productivity Melodies
Meditation Vibes Lofi: Deep Focus Sessions
Peaceful Concentration: Music for Work Time
Piano's Business Beat: Melodies for Work