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 0xa31ce03086c10b9975ae210a9d25d0e39d1e76aefcb86c60c6927e8265c545c6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09caadf3-637d-43a6-9681-82fa23423e5f.json and https://artists.proofprofile.net/proofs/artist/09caadf3-637d-43a6-9681-82fa23423e5f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
2 Weeks (Music from the Original TV Series), Pt. 5
신데렐라와 네 명의 기사 OST Part 6 Cinderella and four knights OST Part 6
Cinderella & Four Knights, Pt. 6 (Original Soundtrack)
THE BANKER (Original Television Soundtrack) Part.5
The Banker (Original Television Soundtrack), Pt. 5
Special Labor Inspector, Mr. Jo (Original Television Soundtrack), Pt. 3
LEVERAGE (Original Television Soundtrack), Pt. 4
LEVERAGE 레버리지 : 사기조작단 (Original Television Soundtrack), Pt. 4
하자있는 인간들 (Original Television Soundtrack) Pt. 1
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 0x0727fe1e24b7a4f3ee822a2dc835a60b8ded71d2a1694e7d4a47451f1057936a. Chain 2 (Bitcoin): anchored in block 958647 (2026-07-19T02:36:14Z), 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/KRA381905070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1042f849c739d1aa532fca59dbea1641577c6ec58faeb43b28746af873e9313f. 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/QZEKE2010018.
TBS For you Season2 Episode.4 : DICKPUNKS
New Recruit 3, Pt. 1 (Original Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6272d6314c120de7535296cf6928f882eea94a37c3b77891b18db436dcaa80b7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ZZA0P2517126.