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 0x745f72348ddb7a310bcf0b1f8c3f15b99b92b325cdb9662afb02f591246dadcf. Chain 2 (Bitcoin): anchored in block 953888 (2026-06-16T04:55:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d04ed57-2dee-4f7e-bbab-e6124364c069.json and https://artists.proofprofile.net/proofs/artist/0d04ed57-2dee-4f7e-bbab-e6124364c069.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Travel Sketch (Refreshing Piano for Sweet Holiday)
Study Music (Concentration, Focus Up Piano)
Sad Consolation (Soothing Music for One Sad Day)
Reading Walk (Relaxing Piano for Reading Book)
Baby Care Diary (Comfortable Soothing Music for Moms)
The Way To School (Beautiful Piano Music)
Sad Fate (Sad Love Story in Dim Memories)
Reading Books Music (Beautiful Relaxing Piano)
Focusing Music for Concentration (Study Piano)
Travel Mate (Refreshing Music for Traveler)
Forest of Rest (Piano for a Pleasant Relaxation)
Soothing Piano for Studying (Relaxing Meditation Music)
Relaxing Piano Music for Deep Sleep (Comfortable Lullaby)
Oriental Historical Drama Style Music (Dim Piano BGM for Sleep, Relaxing)
Relaxing Music for Sleep (Healing Lullaby)
Relaxing Music for Studying (Healing Piano)
Bright Piano for Refreshing Mind (Relaxation, Healing Music)
Soothing Music for Sad Heart (Healing Piano)
Chikyu Seika -Earth Song- (2021Remaster)
COSMOS (~A drop of Milky way ver.~) [2021Remaster]
Chilling Adventures of Sabrina: Season 1 (Original Television Soundtrack)
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 0x827862e000e7599bca35269cd31ce0c4d9bf387f5c70ee4312729e2a9108f722. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAEB1910064.