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 0xfde3a6366cbcab3933750ee27f67b5d62e0ae235e10e8e2b27cc790efc6accb4. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f6b2bd8c-ecd8-41c9-afda-892bd4003b6d.json and https://artists.proofprofile.net/proofs/artist/f6b2bd8c-ecd8-41c9-afda-892bd4003b6d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
棒球小子 (《倆好球》紀錄片原生主題曲)
棒球小子 (《倆好球》紀錄片原聲主題曲)