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 0x79104a771d975ad12e41407c9e7bd9ea343fe9d368f10f56ae8c637d009c8f93. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a28ae929-17c9-468e-84b2-5d9746fd1f6e.json and https://artists.proofprofile.net/proofs/artist/a28ae929-17c9-468e-84b2-5d9746fd1f6e.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 0x2099ec833c916fc67f9dcee097bf71f63b6ad64b4beecec2883076eec4fe11cc. 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/USASX0860813.
Annees de Pelerinage, 1st year, Switzerland, S160/R10: II. Au lac de Wallenstadt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c02f0f365c2d556a99e5a6d63aac87847d9ac7ce4a2f8cef68c22f47cd2755. 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/USASX0860815.
Herz und Mund und Tat und Leben, BWV 147: Chorale: Jesus bleibet meine Freude (Jesu, Joy of Man's Desiring) (arr. for organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a730a323e6dd0e3de48aa73d30bfbb5b86b74a85af715dac7b17aa28d999d1e. 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/USASX0860830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b725b25431c31d5f88f9eabc088625db450b110ade6509d067aa030fdf3e24c. 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/USASX0860818.
Keyboard Concerto in D Major, Hob.XVIII:2: Piano Concerto in D Major, Hob. XVIII:2: II. Adagio molto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a1b195ea3fef89ac3a54959a856eb09cb9f200e463dca6c8b0aa5900f5ebab. 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/USASX0860808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758223faa50b51883b230320eefe528f319f8777058194c2b33a44e28c6c4071. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USASX0860810.
Cello Concerto in D Major, Hob.VIIb:2: II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36056112af24971cae8fec25d4956da2e32371f94a5a678f47b42005cf6196a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USASX0860812.
Choral Music (Sacred) - Palestrina, G.P. / Durufle, M. / Holst, G. / Barber, S. / Dvorak, A. / Farrant, R. / Byrd, W. (Visions of Heaven)
Music Surround Spectacular (The) - The Tests
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92086f9929c72072504629ec824e0dc9b7edac7a418043ed0eec63d3e1a130e7. 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/USASX0817933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f67167d47475b9d75c13ceb8552cc0bdc5946cdd68952f5185820e4add1084. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USASX0817940.
Low-frequency sine wave sweep with harmonic
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb656fa71c45566763cd242f1abd9c9b1d45e822cf366e804040803ca5bce749f. 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/USASX0817941.
Hovhaness, A.: Symphony No. 29 / 4 Bagatelles / Rubaiyat / Prayer of St. Gregory / Celestial Fantasy / Gloria Patri
Pange Lingua Gloriosi - Choral Music for Holy Week
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0e599cc0b9e34bbeae43d0fd98729585a1b68a542e862fc9d1a112bc27b219. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c2dea65a25f5900720f7da101637a3cde4bf0031e366f5b9715aacf00c28a5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34310a70c7f9c10087f021f1fd3dda023e6aa2be1951a7e212733b19052ff6a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USA4N1000286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043f889d082adb2170f18541236123ae979eb9dcefa1466b571ca984b2d05e86. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x198e3919c6930f617f91a0e398d67ac8a5611fdaa808440fccb243beeeb54a3d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1000288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfbb3e6f390eed2b504f26937abdbf16ce6c8aa40545de49df976c863f60551. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1000293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9558c461e702948f0377c713ed96955e0a6fee049a5a740a80b443814eb27627. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA4N1000301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d2657e7deaa812077e18eaf278a72f60116ad68b7019620db461335947f1c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA4N1000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eedd7cac5c1df807b9c26d3b27190bd8873391fe878e8f4c8b79a1768dca1a4. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USA4N1000287.
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 0x086b3731953951c7a19f7402954ff5910ee63cda1210f9c287e48d4afb69b4ad. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA4N1000289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86025f1d8cab8e07f3bfbf45d55ef6dc927d5c0b3f481352accd567a69cd60c2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USA4N1000294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d58855a9412817f18fb374409ea941be708a90865c12f75f82f5baf7b9057f6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USA4N1000295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dcc4d1333db2708f051c435c55b4545261593e2f40986d2814d726b2f118423. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USA4N1000296.
Sacred Music from the Chapel of Saint Basil
Choral Concert: St. John's Episcopal Cathedral Choir - Moline, R. / Ward, S. / Steffe, W. Dawson, W. / Billings, W. / Berlin, I. / Nestor, L.
Choral Music - Rorem, N. / Dirksen, R.W. / Near, G. / Brown, M.S. / Rutter, J. / Goemann, N. / Harris, W.H. / Boles, F. (Sing We Hallelujah)
Choral Music - Wade, J. / Rutter, J. / Grainger, P. / Head, M. / Leontovitch, M. / Dirksen, R. / Pinkham, D. (St. John's Cathedral Choir)
Choral Concert: St. John's Episcopal Cathedral Choir - Campbell, S. / Rutter, J. / Bairstow, E. / Gardner, J. / Sumsion, H. / Piccolo, A.