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 0x38cbad2dceb039978b5ad620753c332c035e64b0d615f8c3f5d524704ffa7131. Chain 2 (Bitcoin): anchored in block 953991 (2026-06-16T18:47:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2efe4a74-068a-4f44-84f2-d933a9d92ab6.json and https://artists.proofprofile.net/proofs/artist/2efe4a74-068a-4f44-84f2-d933a9d92ab6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Belioz, Saint-Saens, Rubinstein, Dvorak: Symphonic Works
Minuet from String Quintet in E Major, Op. 13, No. 5
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 0x15de18526620e9d9d8feeff862f5659b94d8f13934e97585a336f1329a9ceb7d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/RUA150700510 — a six-check JSON result.
Selections from Operas - Glinka, Rubinstein, Rimsky-Korsakov, Tchaikovsky, Gounod, Verdi
Tchaikovsky: Selections from The Sleeping Beauty
Glazunov: Symphony No. 7 in F Major, Op. 77 & Selections from "The Seasons", Op. 67
Glazunov: Symphony No. 3 in D Major, Op. 33
Rimsky-Korsakov: Symphony No. 1 in E Minor, Op.1 & Fairy Tale, Op. 29
Kalinnikov: The Cedar and The Palm - Mussorgsky: Intermezzo, Scherzo - Lyadov: Baba Yaga, Musical Snuffbox, Of Olden Times