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 0xe4dc780bd80096098ddebbd1bcc277d11bcb0e39b435ac468d1b806c491b00a6. Chain 2 (Bitcoin): anchored in block 954717 (2026-06-21T15:47:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3c399ad-b384-48b9-8bf0-eae031004e53.json and https://artists.proofprofile.net/proofs/artist/f3c399ad-b384-48b9-8bf0-eae031004e53.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Vivaldi: The Four Seasons - Geminiani: Concerti grossi Nos. 4 & 12
La traviata: Di Provenza il mar, il suol (Orch. & Arr. E. Kunzel & C. Beck)
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 0x3fe2c73768b12c19e0284f51027a17b51f6c06ebd308ec4dbf9718a3e898c1a8. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USTE10415644.
Gianni Schicci, SC 88: O mio babbino caro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a6975e728319ed034f256fac51373ecbe2d914f0a761ddc1f8c5d66957d2df3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10401260.
La traviata, Act I: "Brindisi" (Arr. E. Kunzel & C. Beck)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2e6122a000390929248a36d0078d2457e3f82ed1785d74537f5a92af03cb85. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USTE10409364.
Ultimate Classical Masterpieces: Mozart, Verdi, Vivaldi
The Four Seasons, Violin Concerto in E Major, Op. 8 No. 1, RV 269 "Spring": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9190d9bbede4af95c239fb63a91be63ac17d5b6553238675aa517c63e16b7e80. 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/USTE10801698.
Eine kleine Nachtmusik, K. 525: I. Allegro (From "Amadeus" & "The Witches of Eastwick")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc382671b0ff1362c6def4f3d78321bcafe8c818f6ac88044f4538a691c16b9be. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/USTE10404221.
Piano Sonata No. 16 in C Major, K. 545: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4838f10fac091495b0d72c2f00187cec9449a00df96d351264412a90df1619. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USTE10308391.
Piano Sonata No. 11 in A Major, K. 331: III. Rondo alla turca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f3567c7c9bcf7643aef5d021f2a52be4fcec3488e8214422bbd4802df5052. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USTE10316313.
Springtime Symphonies: Bach, Puccini, Vivaldi
Gianni Schicci, SC 88: O mio babbino caro (Orch. C. Beck, S. Bernstein & E. Kunzel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ce701b7681b535024d9a05b0030c3557fd0baeb380f5a068f2b29e7e402b63. 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/USTE10401644.
12 Concerti grossi After Corelli, No. 4 in F Major, H. 135: III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2593415e36d0e541edbf8520f9abcf8e6b3bafb6c7665dffaab0d0ae127900. 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/USTE10815698.
La bohème, SC 67: Quando m'en vo' (Orch. C. Beck, S. Bernstein & E. Kunzel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a5c82dd045872ede9cdd1462f529d880ec8b62a30e6c9e49c174aa71081fa8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USTE10402644.
The Four Seasons, Violin Concerto in G Minor, Op. 8 No. 2, RV 315 "Summer": III. Presto. Tempo impetuoso d'estate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee6f8879d2f926cc24f43141300b0a1f5f6f92dad8901d5749965a50988878f. 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/USTE10806698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56aca0d03cb26d58e5987da92128091e5d2bf2358f0c963e4089b88d35d55667. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USTE10407260.
The Four Seasons, Violin Concerto in F Minor, Op. 8 No. 4, RV 297 "Winter": II. Largo (Arr. Y. Kondonassis & R. Werthen)
I Fiamminghi (The Orchestra of Flanders)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffd28ebb50b9b157a19c06aacb536c414eebf24a462a239cfe1161365b99c88. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USTE10311523.
Gloria in D Major, RV 589: VII. Domine Fili unigenite
Atlanta Symphony Orchestra Chamber Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e1a20789ec4520947a8e7af97b9232d7c0f616035be7a3df6087622e4c82ec. 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/USTE10307194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee6f8879d2f926cc24f43141300b0a1f5f6f92dad8901d5749965a50988878f. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/USTE10806698.
Chevalier de Saint-Georges: Violin Concerto in D Major, Op. 3, No. 1
Ultimate Classical Masterpieces: Winter Edition Vol. 2
Ultimate Classical Masterpieces: Winter Edition