1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x40661858660b276ee0af35595e7bde20f0e942cf608b3168fcebf05b2adb363d. Chain 2 (Bitcoin): anchored in block 954549 (2026-06-20T10:56:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a9c503ac-473c-4969-bf95-c7c0dc870d20.json and https://artists.proofprofile.net/proofs/artist/a9c503ac-473c-4969-bf95-c7c0dc870d20.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Twinkle, Twinkle, Little Star Variations
2023 Hit Japanese Songs: 17-Song Piano Medley (Cover)
2023年ヒットソング17曲ピアノメドレー (Cover)
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 → block OTSBitcoinBlock must exist at that height 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 0x73c7cbd189324610672324cf5a8246b94df573a56c876a04f85a33fa64656c8c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCJPZ2439179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344a7609c9c320da469c927adcc826938957b742505a0c5ab6749ec7cefa8bf8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT66J2558827.
A World Where the Sun Never Rises (Piano Cover)
A World Where the Sun Never Rises - Piano Cover
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd980b1aa4dbdcda44a5068b5f1f3833b3e3e9ca68138ce82a4df22878c4b09b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QT66K2514241.
Giyu Tomioka VS Akaza - Battle BGM "Demon Slayer" (Piano Cover)
Giyu Tomioka VS Akaza - Battle BGM "Demon Slayer" - Piano Cover
Encounter Mugen Castle Infiltration BGM (Piano Cover)
Encounter Mugen Castle Infiltration BGM - Piano Cover