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 0xdc7065ae159dfc9d98567bc79c9458dc64d13e37d16dd1da292afa26c67c5306. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42328afc-c358-43c9-81b4-fb3e17b1dfd2.json and https://artists.proofprofile.net/proofs/artist/42328afc-c358-43c9-81b4-fb3e17b1dfd2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
40 Tracks for 40 Years: Delos' 40th Anniversary Celebration!
Opera Arias (Baritone): Hvorostovsky, Dmitri - Borodin, A.P. / Mussorgsky, M.P. / Rubinstein, A. / Wagner, R. / Giordano, U. / Verdi, G.
Tannhäuser: Tannhauser: O du mein holder Abendstern
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 0xe8038717b76eb7da2225cd0909414cb2fd35ccb09de57dd3106b0463247a1a14. 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/USASX0736507.
Andrea Chénier, Andrea Chenier, Act III: Nemico della Patria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9550cb80ae8ec00dc80ef9362fe2fea3a2ddb35360bce38c57566b55ec778096. 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/USASX0736508.
Faust, CG 4, Faust, Act I: Avant de quitter ces lieux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35323286b02841f892eff74cc30defaad4bbb22b2dde52eb3a6a4bb0c25fe058. 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/USASX0736512.
Carmen, WD 31, Carmen, Act II: Toreado Song. Votre toast, je peux vous le rendre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1320e3c70be2f02adb66d37ff1d35ec24d813bd9bf41c917bf375aedb43fbc8f. 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/USASX0736514.
Hamlet, Act II: O vin, dissipe la tristesse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9bfb2e5cdcd672e0863e6fa0b8762432455da2ecd25d2e09618b774b0dd513. 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/USASX0736515.
Prince Igor (Knyaz Igor), Act II: Ni sna ne otdikha
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45fd7d75782508df5487b6da2ee80c9187f61133491abd4b32f2b1b3f8c8bb6. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX0736501.
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
Tosca, S. 69, Tosca, Act I: Tre sbirri, una carrozza, "Te Deum"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1086b811f3deb035f82cf163d35a0d1a9add64b66dc2fb4b270175e98d05b2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USASX0736511.
Opera Gala - 35Th Anniversary (A Tribute To Delos Founder Amelia S. Haygood)
Un ballo in maschera, Act II: Ecco l'orrido campo - Ma dall'arido stelo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14917a713f5c237b4f1e0666d12f0c1b5b16c43402ddcfb43e7ae1c0228f6a2a. 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/USASX1040403.
La forza del destino, Act IV: Pace, pace mio Dio!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f0a70d4db9073bd8d5d60d46b59058b9a1cb814eecfd2f768fc9a6d564c330. 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/USASX1040405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a83449c3ed5d9b67711cc55678268d07f0a2ad449d0ccffdf64dbeff09c0c1. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USASX1040401.
Il trovatore, Act IV: D'amor sull'ali rosee vanne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c98e64eace419be2072f861cb0a2f642310a7cbc9e2883ae8126354da418d9e. 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/USASX1040402.
Il corsaro, Act I: Non so le tetre immagini
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66688758cad02176e7ccc72bc29c573d6741ff77e8041f5816577397b51ee68. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USASX1040404.
Dvořák, Glazunov & Kaufmann: Cello Concerto
Arensky, A.S.: Raphael [Opera] / Songs and Romances
Opera Arias (Mezzo-Soprano): Domashenko, Marina - Cilea, F. / Saint-Saens, C. / Mussorgsky, M.P. / Rimsky-Korsakov, N.A. / Prokofiev, S.
Iolanta, Op. 69, TH 11: Who Can Compare with My Mathilde
State Academy Symphony Orchestra of Russia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3229fc24f0b1f37a973428944d9f8aa10d4651bc434f4c828491c73b9ec3b5f. 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/USASX1856508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1762acfeaf661164012914c9f3ac71ab993c38e67fb143e1f9d68e43d7548ca. 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/USASX1856509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd835821df484a078f5a6a482e6881fe8b20d261fe2331897f56e6603959dc917. 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/USASX1856510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa30e84db228ea1dc1647996d2519c43998f18b11c18075ec8ea92bd0af606e. 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/USASX1856511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe94a7318918db39979737d40304e3fb26fa52dd409007460dd0db43e5376de. 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/USASX1856512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaccfcc6fa9400359090a31ea3595f406f7654b87eead5784913247fe09fe24. 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/USASX1856515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf12ac095ad7f8a91e4d82185773475e6f195dec3af1d1a03cb7fb30fcf746a2. 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/USASX1856518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca708f52c6dd0ee16af8bedb59a8f1d938dc02e238cd4e11bbe2cf07b808daac. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/USASX1856503.
Don Giovanni, K. 527: Deh vieni alla finestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf863dc33316c815ef46e456256a2f89b35fe6da70f5b38ac269740c351c8b37a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USASX1856504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9da2516fa98f67430260cf300b6ea02be5f97f2059b06d657e450ceda5d9d3b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/USASX1856505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf460413ebba10f56b0bce8410d863319b36cb3fa606ad603060c5869974106d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USASX1856506.
Tannhäuser, WWV 70: O du mein holder Abendstern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b1786a0981bebc71f526f18d967d97a93111bbff74809a8b69d96aa49ee855. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/USASX1856507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc88e6f13fd522772ad9b1d834e5fad6a30f5d106c24753bd6c812144e0e681. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USASX1856516.