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 0x7a17343d33b0c67fc6db1433b7118f6f3cbdd476a8c948d422963ce13a1436bf. 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/f146165f-563d-4eb4-b059-6ab739db6d18.json and https://artists.proofprofile.net/proofs/artist/f146165f-563d-4eb4-b059-6ab739db6d18.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alpha Collection, Vol. 12: Choral Music from Canterbury Cathedral (Remastered)
Alpha Collection Vol 12: Choral Music from Canterbury Cathedral
Choral Music by Campbell, Armstrong, Jackson, Bairstow, Cocker, Porter, Tallis, Gibbons, Knight, Ridout, Vaughan Williams
Palimpsest: New Works From Old For Saxophone and Choir