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 0x6c56897cf21d5434a365b198620d31798840f44a9ffecc0a1d9d7ea2865270f7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f579cb9e-04dc-4f85-8f33-e2dc6054e777.json and https://artists.proofprofile.net/proofs/artist/f579cb9e-04dc-4f85-8f33-e2dc6054e777.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart, W.A.: Clarinet Concerto in A Major / Clarinet Quintet in A Major
Klarinettenkonzert A-Dur, K. 622: 2. Adagio (Jenseits von Afrika): I. Allegro
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 0x30ce85b2a08bd2692c93e4dde0b60e9b207f731dc83ba8328c5e03cfb27bd1b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USASX0802001.
Klarinettenkonzert A-Dur, K. 622: 2. Adagio (Jenseits von Afrika): II. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fafc28e164025b341dadaa9d016736f0fc41a0fa5e0b6ae0f35c589df083ed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USASX0802002.
Klarinettenkonzert A-Dur, K. 622: 2. Adagio (Jenseits von Afrika): IIII. Rondo: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40fd2a535e6a8ffe9cb2aadf4cf7355e8c5922110e0208709a520ca59dad4aa. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USASX0802003.
Clarinet Quintet in A Major, K. 581: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc857ea6828f4887f39527e50a8d7d0289d99bbea9549123d078896e21f75ca7c. 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/USASX0802004.
Clarinet Quintet in A Major, K. 581: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9004e2b33591fae1a26205f796a7e1d24481b429f0f1feb57dfb48f8756dcbf6. 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/USASX0802005.
Clarinet Quintet in A Major, K. 581: III. Menuetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cba4c95a6b7fdaae5d1fd8103c2176bd73123cb99fb3a5bb34f8882f46b63a. 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/USASX0802006.
Clarinet Quintet in A Major, K. 581: IV. Allegretto con variazioni
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9950d89d56d1dedba9b9291a373e81f79f026a169eea5098488104a53404041. 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/USASX0802007.
40 Tracks for 40 Years: Delos' 40th Anniversary Celebration!
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)
Opera Gala - 35Th Anniversary (A Tribute To Delos Founder Amelia S. Haygood)
Musically Speaking Mozart Clarinet Concerto & Quintet
Auger, Arleen: Arias - Bach, J.S. / Handel, G.
Baroque! - A Collection of Baroque Gems From the Delos Catalog
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d00749ac772576acd102ccce7aa7bc858b8e9317e175d75f7819d102072e0ba. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/USASX0855609.
Soundscapes, Vol. 2 - A Delos Digital Compact Disc Sampler
Soundscapes, Vol. 1 - A Delos Digital Compact Disc Sampler
Giulio Cesare in Egitto, HWV 17, Act III: Piangero la sorte mia si crudele e tanto ria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c143fd27a5c8a8c79db250a1a4af65d6af56d461d7b6310551ec85e623ae136. 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/USASX0502602.
Rinaldo, HWV 7, Act II: Lascia ch'io pianga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643665bc5a076ab8a4051f8e0248856b286db2951bf665b3f059f23fbf373389. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0502606.
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