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 0x2750c1c841bf6cd10d58ce4f8c8bb85c8110de47f70c0040da98777e7c010e60. 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/6dc63ef8-0cf0-4a18-96a5-a0673166266f.json and https://artists.proofprofile.net/proofs/artist/6dc63ef8-0cf0-4a18-96a5-a0673166266f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
[Vol.113] You Hee yul's Sketchbook With you : 74th Voice 'Sketchbook X Jong Ho(ATEEZ)'
Young Actors' Retreat (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 0x8888972e6b199185a4c1e12d56fa2c9ef0945c01caf150cc7d3da4bd5278b84f. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:15:14Z), 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/QZNCB2186984.
Our Blooming Youth (Original Television Soundtrack), Pt.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205dd36890138f30a001e5d36f42ab7cb72a52add6a5559dc2860f7286860a4e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:27:52Z), 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/KRMIM2334843.
Lovely Runner, Pt. 5 (Original Soundtrack)
The Nice Guy (Original Television Soundtrack), Pt. 4