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 0x076b3531275cfc65ae6b73e4b0e3cdf760a5d2c6a80b12a33a2497fea0048a7b. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/de5d8611-d893-4926-b9b6-0a0928c7f031.json and https://artists.proofprofile.net/proofs/artist/de5d8611-d893-4926-b9b6-0a0928c7f031.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Goodbye manul vol.1 (굿바이마눌 vol.1) [Original Television Soundtrack]
Good bye manul vol.3 (굿바이마눌 vol.3) [Original Television Soundtrack]
Show Window: The Queen's House (Original Television Soundtrack)
Again my life (Original Television Soundtrack)