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 0x94b3401e6c8582dea303ddfff2564509b55d28b1edffbae1efab2bc2a55d06a7. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f9a7557-d667-48ec-ab96-ea9378795135.json and https://artists.proofprofile.net/proofs/artist/8f9a7557-d667-48ec-ab96-ea9378795135.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Miserere: Works by Gregorio Allegri, Leonardo Leo, Giovanni Moro da Viadana & Francesco Scarlatti
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 0x39cc9e86fa68eba47cc91f5c533cdeeb0433b4f67b1920af897c9b6f6f29fa0e. 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/FRZ130100631.
Miserere a 9: No. 2, Et secundum multitudinem - Amplius lava me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfadf57153bb2b2eaa2bfe3ab81b3834b436567e7485257ab0f2ed42d2dbdc4. 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/FRZ130100632.
Miserere a 9: No. 3, Quoniam iniquitatem - Tibi soli peccavi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd33b3c9d15791205074c370642b93e1352e1deeaffbe65d84fe908391649b9. 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/FRZ130100633.
Miserere a 9: No. 4, Ecce enim in iniquitatibus - Ecde enim veritatem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bed147f10500df28d04764d26d5e5fd781dc33c99198791302c8730c1185f4f. 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/FRZ130100634.
Miserere a 9: No. 5, Asperges me hyssopo - Auditui meo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8b960108772b8dd6d9a0debc14267a1e26d10f5f563c09ec3116f9d1b903f9. 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/FRZ130100635.
Miserere a 9: No. 6, Averte faciem tuam - Cor mundum crea in me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8f9e402f9a677556ad48d0cf849ade44374becfe9cc654073032c687bbf85. 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/FRZ130100636.
Miserere a 9: No. 7, Ne projicias me - Redde mihi laetitiam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d41c2aefe7b17af584b008382c7300d4cfa43d1fc02a61aca871ab1afcc293. 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/FRZ130100637.
Miserere a 9: No. 8, Decebo iniquos - Libera me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb8252f99a68863bf3976c07b3553d018178c7ff1c262156ff44a137259bbeac. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FRZ130100638.
Miserere a 9: No. 9, Domine, labia mea - Quoniam si voluisses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f098a21d553aa4ea26a49c85e926fda3977d266351a2ee6c0fd4ac742fa802. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRZ130100639.
Miserere a 9: No. 10, Sacrificium Deo - Benigne fac, Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bcc9aa98e8917cda771dea805f507e85a563c3b689ccadad257d8cff055801d. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/FRZ130100641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08747596af8ac60fc717509c150b9df77a10a897876ee6958c33951457b653b. 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/FRZ130100642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67500f25f063ec7379f9d046d94423780d058feb5e9e727c1ba095f7ab1a5ab3. 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/FRZ130100651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b43fd2dcd684db9745a74a6b2255e7e584d866ebe6c9c673101835bb79058de. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRZ130100652.
Miserere a 5: No. 3, Ecce enim in iniquitatiibus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8264ea075217c2e905f275e82dd292a6546d306c93e14c4363c16699869f73f. 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/FRZ130100653.
Miserere a 5: No. 4, Aseperges me hyssopo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59247275783ba5dfbcea293d9509e8c7a22eedc258881d5354c7ec8a80f82dd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FRZ130100654.
Miserere a 5: No. 5, Cor mundum crea in me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd824c0930647a481910aedf91de320d1b676db82826345472e358c728af32e6. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FRZ130100655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0780b5aba3d7ecd712185c140874c202afa3b33a61c558bd553a172e085f38e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRZ130100656.
Miserere a 5: No. 7, Redde mihi laetitiam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27e71bd69ab876bd69a3ebe5cd8adcb665cd7e01ea59514ffd3f7672f129d80. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRZ130100657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a08411cb8f97ee115d5799299dd2c13ec77cfeb99bb415c0f04b1e5d791861. 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/FRZ130100658.
Miserere a 5: No. 9, Benigne fac, Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b413247720ce6b54271627b6b01ce8851532e71cac5a6e40f430eea205cc57. 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/FRZ130100659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d6bb7516a67e6839801493345fa0e93d52e3b6ebb657ee81a1445c6f23799. 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/FRZ130100661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744f2c1dbdebffde1b5e9d60ddefb05a1d0c814ac77d5de0a771ddaf0b0f8d2e. 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/FRZ130100662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e703bd9c472da7e56247d0f33df304fd8da99acbe2f9288c21c6d582e08fcb2. 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/FRZ130100671.
Stabat Mater Dolorosa à dix voix: Stabat Mater Dolorosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cdb3b0a05ce51dc56a03a57891fab8518424caaf66b14cb17a3b8e11ca7de0a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ179900750.
Stabat Mater Dolorosa à dix voix: Cujus animam gementem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ff3c5bf790a21d4fcf636b893099c3583283f37da0874fede24ec0fbdc7421. 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/FRZ179900760.
Stabat Mater Dolorosa à dix voix: Eja Mater fons amoris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b4a04b0eef0fc2210376d6a48d8d17d63ab9226e0a2ac2e4925f5bccd54fd. 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/FRZ179900770.
Stabat Mater Dolorosa à dix voix: Sancta Mater istud agas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3375f7b47a1b06263bb2c12d8df96e64e9861e86e465acd2c1f121ceea7c7837. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRZ179900780.
Stabat Mater Dolorosa à dix voix: Fac me vere tecum flere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed7cd1225780e76bf904e86bebca5dfe872e88c2b3219b1252acf9415044e3e8. 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/FRZ179900790.
Stabat Mater Dolorosa à dix voix: Juxta crucem tecum stare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2138e55cada55ff4689bb7e5b56892b4b30f0ee03367e8b90b3605b259baf5de. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRZ179900800.
Stabat Mater Dolorosa à dix voix: Inflammatus et accensus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb243e0c33ed949089512e6c70f02f88764ac5d7c2b6f305d800a080a7f935675. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRZ179900810.
Stabat Mater Dolorosa à dix voix: Fac ut animea denetur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc05ee4b9d2a1c020ff05186d3b7290e363b361898ebf3e7f72b6209b4dd2e79. 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/FRZ179900820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16696d8fe0b47ebbf68b6d4eb4d773db7785164f7461bc23eeefca0a8e4fa31b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRZ179900830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb50b6e815a563dbe4c3c889d65d3423a540aed7868fbe0971c056809cf0cfe. 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/FRZ179900840.
Messa Breve La Stella pour double choeur: Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d87aa6f1303250395ba833f95c88445b1fc953a4c2860ec35d6a3946255e9. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRZ179900870.
Messa Breve La Stella pour double choeur: Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206c870e3045e9d0ecdf92ffac493c295d9c0844d8d79704111d2c1fd81dc66b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ179900890.
Te Deum Laudamus pour double choeur: Te Deum laudamus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9f53adacb096183fff4b4359078fd3989b439570cf7a64411cb4e6be07e91e. 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/FRZ179900900.
Te Deum Laudamus pour double choeur: Te ergo quaesiumus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3652b81c0dd7bff27698a13dc623a4e385cd2b8e9f6d8ff737317b96471d9fb0. 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/FRZ179900910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c2c8d644fa1c589c328742b06cc07fe4aefacf0685514e79e7b4669505d5f1. 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/FRZ179900920.