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 0x3257355c0021dceefa5d831b937130ef0e681c97f14258662cf13e0f5554827a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4b659fb-9533-49cb-a418-ac95ea24cc12.json and https://artists.proofprofile.net/proofs/artist/a4b659fb-9533-49cb-a418-ac95ea24cc12.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Monteverdi: Vespro della Beata Vergine, SV 206
Monteverdi: Vespro della Beata Vergine, SV 206: Invitatorium. "Deus, in adjutorium meum intende"
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 0xd6d9c449bde36eb594f8e9083a9929a51963828d9d08a8e938ead5c21e3a5840. 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/FRZ209713501.
Monteverdi: Vespro della Beata Vergine, SV 206: Psalmus. "Dixit Dominum"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa22247a9be3c202e0bf4ad8abc05f55764efd79426a7f9e5f13dddbf9c6f7cd. 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/FRZ209713502.
Die Fledermaus: Act II: Introduction: Ein Souper heut' uns winkt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63cda1c346db316bd81852cae2db4a69673463a92aa8f02f783948878c567e8d. 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/DEP629601260.
Vivaldi: La Virtu Trionfante Dell'Amore, E Dell'Odio, Overo Il Tigrane (Fragment)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9339ffd83070133f4b1277258b176f5448cee8842fe884f13469b6f8c488ef. 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/QMDA61425125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25779ea394ca81ca1af58ac051b35d20286359a426cb9aa9005151d279c222c7. 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/QMDA61425128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fdff5f7ad8c87cb0fc2d2168235b0a23cf97b9a72a57bd8b63f398518d798e. 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/QMDA61425133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3e3c24a872bb67dc181eb71c96be37435781c8ff4ff3e15ce7213a892b0775. 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/QMDA61425134.
Stabat Mater: XI. Duetto - A Tempo Guisto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9aaef0e322afb024bff957f3978e09e60778e5137650bc141cdc439f4e1744. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMDA61425135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba34580c7a10e28889fa4f596568f2a06ed8c087c081b38ea0e1bed10e1f3c0. 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/QMDA61425143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6195a97b1adfb343a20647699073e3a2883c8e154f986307ba2b29d3d3f0fd95. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QMDA61425145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5d7994ccda2b246cc16d7c01c6be612bf5ba646a4a743c877c74fcb263d840. 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/QMDA61425151.
Stabat Mater: II. Aria - Andante amoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0195eacf5ced9d5467b9e7f4aa3f8069cccf9bd6c92c3adb13d84ad24270f244. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QMDA61425126.
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 0xe87f18ddcc4bda029d1d54b57758e7ec3129d7299954ce8abf37e431dff9e459. 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/QMDA61425127.
Stabat Mater: XVII. Duetto - Largo Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600d6b65d1a59cb9e77eab3eaf78e544025e8d008362766ba3d8f64d9afb09a7. 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/QMDA61425141.
Stabat Mater: XVIII. Amen - Duetto - Presto Assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360ccd61f5e50bd81f11aabf24d1338a56c270060214eeab9c7c59767ec9d216. 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/QMDA61425142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3b3997b56e4d0d891f7e86b83ae23598d0bb28a6fc9e06e92388e566aea5ab. Chain 2 (Bitcoin): anchored in block 960101 (2026-07-29T11:46:30Z), 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/QMDA61425144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f986e69fe69b7da69515576d20a5b1832e284c3528c00e6cfee5baa10e3f85d. 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/QMDA61425146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd995fa0e590f58f471f3e30a59e3d0eb77ac760bc3d0ca718ac3a6572aa74e92. 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/QMDA61425150.
Brain Powerd (Original Motion Picture Soundtrack 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ac75e0372d807ac0bcee7a6b4e9735c1d8b9a16136eb774dfe2981bc006862. 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/JPVI09815100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e15a87a87475267cc5255dc974e290f7a26c82bc919958e8e29ba0e58dc1057. 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/JPVI09815230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d5c50bd2a6efde948d7153b98415e533c42f7f2115d53eca75f4b7ce8808d5. 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/JPVI09808780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa258de0ac7fb26f4d07477fc62dfd1fde3176768e177982e56aec0ef00a74625. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/JPVI09815130.