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 0xad4a9a30c54f6bd4dfc79d0d2e30c55479803c3a6d9ab2c5552bf7a6d025aa81. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/895baa46-695c-4e69-80fa-45f54f2dc5a2.json and https://artists.proofprofile.net/proofs/artist/895baa46-695c-4e69-80fa-45f54f2dc5a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music for Chill Afternoons (Trumpet and Alto Sax)
Music for Chill Afternoons - Subdued Trumpet and Alto Sax
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 0xf64db755dc7300f306daa928de8bbed93c772b23ecef40267433ef97252d2627. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:51Z), 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/QZRCW6968960.
Music for Intense Seconds (Harmonica Solo)
Backdrop for Study Buddies - Harmonica Solo
Jazz Organ and Guitar Solo - Music for Lazy Chairs
Backdrop for First Curiosity - Simple Harmonica Solo
Music for Intellectual Steps - Piano Duo
Jazz Piano Duo - Background for Intellectual Steps
ワーク・ライフ・バランスの練習
ワンダーラストの気まぐれチューン