thumb|Anton Reicha, 19th century Anton (Antonín, Antoine) Joseph Reicha (Rejcha) (26 February 1770 – 28 May 1836) was a Bohemia-born, Bavarian-educated, later naturalized French composer and music th
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 0x44d8258adb38348bd4e6670c72b7f63147867624c41405ff09dee123610db050. Chain 2 (Bitcoin): anchored in block 953875 (2026-06-16T02:12:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07eedbc9-7518-4f70-b86a-d674375620a0.json and https://artists.proofprofile.net/proofs/artist/07eedbc9-7518-4f70-b86a-d674375620a0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reicha: Variations / Bassoon Quintet / Bassoon Sonata
Reicha: Wind Quintets, Op. 88, No. 2 and Op. 100, No. 5
Reicha: Wind Quintets, Op. 91, No. 6 and Op. 88, No. 6
Reicha: Wind Quintets, Op. 88, No. 5 and Op. 91, No. 1
Reicha: Variations - Bassoon Quintet in B flat major
Reicha: Complete String Quartets, Vol. 1
Reicha: Complete String Quartets, Vol. 2
Reicha: Wind Quintet in G Major, Op. 88, No. 3 & Adagio in D Minor
Reicha: The Complete Chamber Music for Clarinet
Études dans le genre fugué, Op. 97: No. 12, Air. Lento
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 0xa163c14252ed909793e5dd2bf3bd4d773deb9d4edcdb0d24707dc835b1850620. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:37:53Z), 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/GBLWD1803823.