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 0x05ea4e34c7ffe1b9589e7304c220dcf858d2a45ca160e8adb72d4332cac42124. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30b2d4c3-6386-4fca-a1ee-4a2a622b44fa.json and https://artists.proofprofile.net/proofs/artist/30b2d4c3-6386-4fca-a1ee-4a2a622b44fa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Festliches Barock (Orchesterwerke aus der Musiksammlung des Grafen Rudolf Franz Erwein von Schönborn)
Franz Christoph Neubauer: Sinfonie "La Bataille", Violoncellokonzert B-Dur, Haydn: Divertimento, J. CH. F. Bach: Sinfonia
Mozart: Drei Konzerte für Cembalo und Orchester, K. 107 - Haydn: Sinfonia Concertante in B-Flat Major, Hob.I:105, Op. 84
Weihnachtskonzert (Im markgräflichen Opernhaus Bayreuth)
Bamberger Hofmusik (Musik am fürstbischöflichen Hof zu Bamberg)
Piccola Serenata in B Major: I. Allegretto - II. Larghetto - III. Minuetto / Trio - III. Presto
Salieri: Zwei Symphonien, Konzert für Flöte und Oboe, Piccolo Serenata
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 0x3d76763cea764a1ab6f59f3acbbd7cc96164964db3b5ee375976e0572d0bc0a7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DEQ109050004.