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 0x2780b27746bc73d4cf75c789129755462707c6f54c89e5bfb7ef730aa7beba6a. Chain 2 (Bitcoin): anchored in block 954115 (2026-06-17T15:44:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79366dc1-9399-4a3f-87bd-189a52ffc214.json and https://artists.proofprofile.net/proofs/artist/79366dc1-9399-4a3f-87bd-189a52ffc214.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tuscania, Vol. 2 (Mozart Transcriptions from Zauberflöte & Cambini Duos for Two Violas)
Tristis Est Anima Mea (Instrumental Version from the Responsoria Pro Hebdomada Sancta)
Mozart in Florence (The Expectations of the Mozarts at the Court of the Grand Duke of Tuscany)
Glassworks: I. Opening (Arr. for Gothic Bells, Strings & Theorbo)
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0xce42c5b79e4c1092ad715eed4c8cce597b7526d78eac0ff770e3d3f649d59c12. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42053634.
Kurd Shepherd Melody (Arr. for recorder, two violas and cello)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9aa22ae3f63744ef03b423c863ca5faaca18c5bf0296cceb9b2b2f91327632. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42063459.
Rumbling Divertimenti (Chamber music with oboe and double bass on historical & period instruments)
Musica e Regime 5 (The 5th Volume of the Serie about "Entartete Musik" for String Trio)
Beethoven & Fellows (Chamber Music Beethoven, Hummel and Archduke of Austria on Original Instruments)
A Gold Box (Boccherini and Dittersdorf Chamber Music with Double Bass)