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 0xc5e3e3515501fa85dd0812eee2fa590f649ca7c16cf798e0081e770f2cdf22b4. Chain 2 (Bitcoin): anchored in block 954728 (2026-06-21T18:08:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f942bf57-b55d-4f0c-91ca-9b3b000c0c77.json and https://artists.proofprofile.net/proofs/artist/f942bf57-b55d-4f0c-91ca-9b3b000c0c77.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
빠담빠담 (Original Television Soundtrack) Pt. 4
I Can Hear Your Voice Pt. 3 (Original Television Soundtrack)
MONSTER (Original Television Soundtrack) Pt. 5
로봇이 아니야, Pt. 3 Original Television Soundtrack
The Light in Your Eyes, Pt. 6 (Original Television Soundtrack)
The Light in Your Eyes, Pt.6 (Original Television Soundtrack)
The Fiery Priest Pt. 6 (Original Television Soundtrack)
I Wanna Hear Your Song Pt. 4 (Original Television Soundtrack)
When the Camellia Blooms (Original Television Soundtrack) Pt.11
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 0x7b8da56fae4124ce1a2312fcf4658add52a2d86645b2076bf3b69c05e1418b7f. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/KRMIM1921302.