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 0x167dbc579533fff2c234bea5d368d270c4f992198678f254c0e2b971fffebdf2. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87df9c66-bb95-427c-b6df-2225b730044d.json and https://artists.proofprofile.net/proofs/artist/87df9c66-bb95-427c-b6df-2225b730044d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
I Know Why You Were at Paradise: Prelude to Paradise Lake 2
Psycho for an Angel: Season One (Slow and Reverbed) [s+r]
The Girl From Hollow Lane: Prelude to Hollow Lane
The Paradise Collection: S&R (slow and reverbed)
Psycho For An Angel: Season Two (Slow and Reverbed)