thumb|Interior shot of Orchestra Hall during a Young People's performance. The Minnesota Orchestra is an American orchestra based in Minneapolis, Minnesota. Founded originally as the Minneapolis Symp
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 0x4e0da0e95b4672821f52216352306e632da74e475084eb7804f6167ccfb2da65. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47b63506-5665-42ef-8d0c-8a3851b17e51.json and https://artists.proofprofile.net/proofs/artist/47b63506-5665-42ef-8d0c-8a3851b17e51.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Mahler: Symphony No. 8 in E-Flat Major "Symphony of a Thousand" (Live)
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 0xc76df195b9c94e14c70d087b974fb63621f0c29e4314e0475ad25b51a9c3bd2c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/SEAEU1648010 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba0cd5d7deb2cd3cba5a1a7fa582a2a371443f87ead623946577964cc2f63e1. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEU1648020 — a six-check JSON result.
Kullervo, Op. 7: III. Kullervo & His Sister
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c125559111f8e60415d0c487c96e7469aca9c327662dc6dc547caa054c60319. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEAEU1648030 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a4f42ceea442bb337051168542ff10c646dae4afaeb4b348afd5c1f3b91316. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEU1648050 — a six-check JSON result.
Mahler: Symphony No. 2 in C Minor "Resurrection"
Beethoven: Piano Concerto No. 3 - Mozart: Piano Concerto No. 24
Paulus, S.: To Be Certain of the Dawn [Oratorio]
To Be Certain of the Dawn: Pt. II: Remembrance: This We Ask of You (chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc0d95454770b75dea2602743e083f323860eaade6dcdfde8fb8d977109edea. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEAER0826110 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a4f42ceea442bb337051168542ff10c646dae4afaeb4b348afd5c1f3b91316. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEU1648050 — a six-check JSON result.
Mayer/Skrowaczewski/ Minnesota Orchestra
Beethoven, Van L.: Symphony No. 9, "Choral"
Symphony No. 9 in D Minor, Op. 125 "Choral": I. Allegro ma non troppo, un poco maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb314519138215689bdac1927fa71f5a1052d4cfef86790a95942309ef640da07. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0616010 — a six-check JSON result.
Symphony No. 9 in D Minor, Op. 125 "Choral": II. Molto vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807585d25cf1180f9cb736b3d9232029780e9446bf04553ca93126d6dc7007f6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEAEQ0616020 — a six-check JSON result.
Symphony No. 9 in D Minor, Op. 125 "Choral": III. Adagio molto e cantabile - Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c3e6c7c905abad767947cfd261489d8a97b461a46dd837def23e2b27c8b3cd. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SEAEQ0616030 — a six-check JSON result.
Symphony No. 9 in D Minor, Op. 125, "Choral": IV. Finale. Presto - Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e16341a2a7c9bd50c5219d14ccfaea649fcdcb89d1ba79c0d3b18c3f20037fa. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEQ0616040 — a six-check JSON result.
Doráti: Symphony; Nocturne and Capriccio; Interview with Doráti (Antal Doráti / Minnesota Orchestra — Mercury Masters: Stereo, Vol. 24)
Pavane pour une infante défunte, M. 19 (Version for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1212e59de173f61d82dbb0128e5818546ce24ae1514dc4cd9a3198ad16cea074. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI192430586 — a six-check JSON result.
Soviet Classics (Standing Ovation Series)
Romeo and Juliet, Suite No.2 from the ballet, Op.64b: 1. Montagues & Capulets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b66a1fffb9f5a4fb70f5fb47229ca3bc98a8ceccf187bec33bd65955eb7cd0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USZDG0601719 — a six-check JSON result.