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 0x1b43818ec05184488fc6010f77d9ede844323b4b434c9cd8f86ea0249ffc1280. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f0c9819b-9bed-4f0e-b709-916bafc43ee1.json and https://artists.proofprofile.net/proofs/artist/f0c9819b-9bed-4f0e-b709-916bafc43ee1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kingdom Hearts Music Box Collection (Cover Versions)
Kingdom Hearts - Paraphrase World Tour (Cover Versions)
Reality in the Dark + Music of Quadratum