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 0x07b84e6fdea5e8c52a7d56e2012a6606d15de4c50aad4a3e2a7edb22035561aa. 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/827211a1-30f4-4e8e-9202-413dfdc36e86.json and https://artists.proofprofile.net/proofs/artist/827211a1-30f4-4e8e-9202-413dfdc36e86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
My First Time (Original Television Soundtrack), Pt. 4
Let's Fight Ghost (Original Television Soundtrack), Pt 1
Introverted Boss (Original Television Soundtrack), Pt. 6
Because This Is My First Life (Original Tv Soundtrack) Part 7
Because This Is My First Life (Original Television Soundtrack), Pt. 7
Top Star U-Back (Original Television Soundtrack), Pt. 2
Top Star U-Back, Pt. 2 (Original Television Soundtrack)
Will You Go Out With Me? ('Can I Take It Back?' Theme Song)
Check in Hanyang (Original Television Soundtrack) Pt. 4
Because This Is My First Life (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 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 0xcad397a48aeab0a64c4f014aaf5a24c8dc16d97fab6ead334b7fd6359f8daa40. 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/KRA491700279.
Let's Fight Ghost (Original Television Soundtrack)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75c87caf3bd40f37672c337a00cda7fec3bd7eba29a42781172259d5d917e69. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/KRA491600548.