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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e04ba576e1a03a39beb92f934a5b810f829124cb02b57913ffa523664f9b633. Chain 2 (Bitcoin): anchored in block 953879 (2026-06-16T02:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/09730595-2e67-4430-969a-3354ae582395.json and https://artists.proofprofile.net/proofs/artist/09730595-2e67-4430-969a-3354ae582395.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7539467bcd19cf3be29e595ffa48555e1fbde23721c774fee37f5f5f79780944. 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/USB8U1613382.
Après un Rêve - Arr. for choir by Alexander L’Estrange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52fec0972f71eb0fbcdfefd7c0cc0f05e7621d9ccdb009b8633e55f78de8b84. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBLLH1229904.
Spiegel im Spiegel (Version for Violin & Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ee3c49d06b77802b8f515b7479b53c9a6403c876b6d4d85f2499ffe33e90da. 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/USB8U1611850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9f6073f9b7d32fc0d3215005d828caaf39382a4438e0c18faf2fb436f7d43ac. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USB8U1611876.
Toy Symphony: And Other Fun Classical Favourites
Music for the Royal Fireworks, HWV 351: IV. La Rejouissance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd33db83325dc8924171c4a5cadf190efbc7346475e043d8dd08f625cba8fee. 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/HKI190516621.
Cassation in G Major "Toy Symphony": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb73e670306d0608521e4a6033b22df5779ccb6a7c7ad84e2e412eface10be6c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI190813405.
The Four Seasons: Violin Concerto in G Minor, Op. 8, No. 2, RV 315, "L'estate" (Summer): I. Allegro non molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ea464b20c2b74eff1b3b0b7327d81bfb8d29619657841b8cfbe16ed9e5c005f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/HKI190622804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9248771d0000f432ceaa63f724c9c6f67d15811322754b0e70f7010b61626bca. 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/GBJZY1900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7335e5918d20ade119b3f233253f444186f9e0eb26fb8b20bed359ddcac93b1. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBJZY1900019.
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 0x9fd49ce7963241a302756c1f5a4ab11be100c0084a78bb45686cc2c3cb29caab. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBJZY1900020.
Máscaras: III. La pasión según San Juan de Letrán
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547db9f49a72d4df456ee0bb7c5eabbf4a9ee5538e3c06dd964ca40b0d059563. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBJZY1900021.
Shostakovich: Piano Sonatas Nos. 1-2 & Piano Concertos Nos. 1-2
Piano Sonata No. 2 in B Minor, Op. 61: III. Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24febffaf3219fccb07d37a986e66b0ca3cfdda6edc9cbf63027d2e670bf7fed. 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/GBLLH1749308.
Piano Concerto No. 2 in F Major, Op. 102: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e7ebeb8bcf0838982eeeacee65bb6745d613d73455ef1291cb958a61a48272. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBLLH1749310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2974faf0823dd6694df1aef4244c512f27805ab66116d769ffcfb0a690c9f7a0. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBLLH1749301.
Piano Sonata No. 2 in B Minor, Op. 61: I. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedff89ac1730f3ee3f8b00bb4a7090b6a48e27f48323b53864dd71ce911240cd. 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/GBLLH1749306.
Piano Sonata No. 2 in B Minor, Op. 61: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d843e6bf6624aea8e2bb1c02cace1e88634664cb639e56652626c88d36c1b07. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBLLH1749307.
Vaughan Williams: The Lark Ascending, Violin Concerto in D Minor - Elgar: Introduction & Allegro, Serenade for Strings
Serenade for Strings, Op. 20: I. Allegro piacevole
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf250fa59ae61dbeb1c23d1fd5b79a67ef0ee40d4ffb74f9d9739668f6033d03d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBLLH1439905.
Serenade for Strings, Op. 20: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f803f3ae83ca0c9033f5ef800358fbdb92c0e3a67e4d0c2c8277227197e5a25. 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/GBLLH1439906.
Concerto for Violin and String Orchestra: II. Adagio - Tranquillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b48aa51a9506fee73c0fb4f00e10d3b0149cab73913d10e9355dda5d9dde2e. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/GBLLH1439902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc676954c8cdbf0354c730b9f505d0e9df0078ae69dbab47370debed2ecf2f2b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLLH1439908.
Mahler: Symphony No. 4 - Berlioz: Les nuits d'été
Copland: Quiet City Suite - Barber: Summer of 1915 - Gershwin: Summertime
Copland: Clarinet Concerto & Appalachian Spring - Finzi: Clarinet Concerto & Romance for Strings
Bax: Piano Concertino - Ireland: Piano Concerto & Legend
Mendelssohn: Violin Concerto in D Minor, Concerto for Violin, Piano & String Orchestra in D Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a14b72eb46a6ef5f6f123b8ecf16fdd497b6969be224db09baa11b83d08276. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NZFZO1900661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b28c951972cd7422d1d3a026ff346812cb5e9b214a1507cf0aafe912171acf8. 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/USACX2200443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e81dcd32ac3e82cd0e943efc9a9db56d0dd904909c39af88dc90de2aecea9e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USACX2200446.
Summer's End: The Poems of Margaret Buckle with Music by Edward Watson
Psalm: Contemporary British Trumpet Concertos
Tamsin Waley-Cohen: Lullabies for Violin