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 0x41e55f694ac1ed83bd8ac0a1c65090f6c0f9305d9de27260ae7ae746b4978df3. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69d1edaa-6a61-4126-8ee2-c2dad571dd63.json and https://artists.proofprofile.net/proofs/artist/69d1edaa-6a61-4126-8ee2-c2dad571dd63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Meistersinger von Nürnberg, Act 1: Vorspiel
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 0xe2e6d802573627dfe8544c7bde02d1e613e62c0e0d39e25f0e585f91e9ce230e. 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/USB8U2201240.
R. Strauss: Elektra, Op. 58, TrV 223 (Highlights)
Verdi: Les grands opéras I - La discothèque idéale de Diapason, Vol. 13
Verdi: Il Trovatore (Metropolitan Opera)
Il Trovatore: Act II: Vedi! Le fosche notturne (Anvil Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc692741785a644738a9d4fb27b68826aecd8f977aecfb8c967ec24b580446. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USY3P1101160.
Wagner: Die Meistersinger von Nürnberg (The Mastersingers of Nuremberg), WWV 96
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x502a1442c941e4e57ee985cbfbf7e388c024c840eb0f48ad6a52c0250d588a90. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USY3P1100996.
Mozart: Le Nozze di Figaro (Metropolitan Opera)
Schulhoff: Concerto doppio - Krenek: Concertino - D'Indy: Concert
ピアノ三重奏曲 第29番 ト長調 Hob. XV: 15: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e4d5747021c2dfc6f69a9313dea59237d82cd6ea0f6c00aba0b44eacd943bb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPL251700119.
Michael Haydn: Chamber Music for Flute, Horn and Strings
Quartet for Flute, Violin, Viola and Violoncello in D Major, P. 117: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b76d493c994fd8492afb020b9c28d30d7eecad5b074a6de27b1cd054ea56131. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ATMA40503647.
Romberg: The Desert Song - Blossom Time - The Student Prince
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3bdba5c27a35173e60e2d4368341800a95e0d17f7962d067af370f13aae64f. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ATTE42011101.
Strauss : A Night In Venice - Benatzky and Stolz: The White Horse Inn - Lehár: The Merry Widow
Devienne: The Complete Quartets for Bassoon and String Trio