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 0x760147752e9dabb3c897ceac7a9610a01f9fe9885808809d77ef399d23b6a3f7. 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/c1905943-0b0d-4c7f-848a-4cb082c1ffb9.json and https://artists.proofprofile.net/proofs/artist/c1905943-0b0d-4c7f-848a-4cb082c1ffb9.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 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 0x8c10cbfef158861db1ba3597b88f999ece63fff4c1dab83bfd1a0d14d0cc967f. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DEF059531101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149368149a9fa7a91222120608bfcf9bac108e19a9565f8458202f29224abd01. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEF059531102.
Stabat Mater: 3. Quis est homo qui non fleret
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a9d5d4bb9f292618d38748d44cfc8dd9cf7bff6cee6b6552125914058faae6. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DEF059531103.
Stabat Mater: 4. Pro peccatis suae gentis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8262ba33dc714adeec7919c97be84d59067a9a7a07d6c95dd2f4d96dfc569ad. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEF059531104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3845f07f9e6b6058f7b161e81cb0a9984bcfc757c7d18d54f519cafd8b76c9fd. 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/DEF059531105.
Stabat Mater: 7. Fac ut portem Christi mortem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa653227cd96338adca0b78c2c16d788d40c13b6a72277a7c3e2566d04ac3d08a. 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/DEF059531107.
Stabat Mater: 8. Inflammatus et accensus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a436e8e9757dd7bd9babff7d15212a562c02112920bd31c1187e9e1a1c611d. 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/DEF059531108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4ccb57b2ea0b8050026dc7b1b42016e530662e316b7ed11c6b3ff02edcf6ff. 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/DEF059531109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfede34d3109bb33212d78a247a26403eb325d2a98865fc4e779a39fe8bf5d160. 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/DEF059531110.
Messa di Gloria: 1a. Kyrie: Kyrie eleison
Academy of St Martin in the Fields Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1dd1d92cba50955fbe39be51c157249f02f389136abe0179fede22ffbb3a30. 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/NLA509010301.
Messa di Gloria: 1b. Kyrie: Christe eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be1ab205c8ce06a7a16fa57b5d07f40c044ffae9afac2e5dfad786e1b691d29. 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/NLA509010302.
Messa di Gloria: 2. Gloria: Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4808fdadfdf8134da392ff459fd6ed6bfd6a426ce48cc0ad267d06e356039361. 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/NLA509010304.
Rossini: Petite Messe solennelle; Messa di Milano
Petite messe solennelle (Orch. Version): I. Kyrie: a. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e241a9301776e2437499660748b0b91a05ad1bee4f1b7c2eb3d82527dfde411. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLA509411701.
Petite messe solennelle (Orch. Version): I. Kyrie: b. Christe eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fe5eb6f128d845009ea7553b6c0cf49a7ad8c01dbc298923d6849792f0071d. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/NLA509411702.
Petite messe solennelle (Orch. Version): VI. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b2eba0ca00df24f6c002f416c696c67cccef7b28f883ed81374b799d99aba8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLA509411714.
Petite messe solennelle (Orch. Version): I. Kyrie: c. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed259cd953ffab147ac40221086174ac782044d18e5f7ebb2f0405174af7184d. 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/NLA509411703.
Petite messe solennelle (Orch. Version): II. Gloria: a. Gloria in excelsis Deo – b. Et in terra pax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44d44a4fae67b49164d55f42b3f02c355383a67afc9693ba24a61687a862aca. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLA509411704.
Petite messe solennelle (Orch. Version): VIII. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe886e42068568b947a6bc6cefbf5fbdc622a09b444154bcf4b81a74768ed658. 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/NLA509411716.
Petite messe solennelle (Orch. Version): II. Gloria. c. Gratias agimus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ade8ec9ae9694fb8f902d6d15433be9d5db28b89faac1d3fe821370bfa4ad. 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/NLA509411705.
Petite messe solennelle (Orch. Version): II. Gloria: e. Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa28b256d2b2b5b536e74ab705d9aac77aef4cf4955f8005156fda4911996137. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NLA509411707.
Petite messe solennelle (Orch. Version): II. Gloria: f. Quoniam tu solus sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e09608b44879b22e69222a57a555a2baef6eed438d56de90bead7b8c595955. 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/NLA509411708.
Petite messe solennelle (Orch. Version): II. Gloria: g. Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b359e939feec6d0ebe1c50d81c806c2c3e3bc50821eb1f6de3073ff4d86feaa. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/NLA509411709.
Petite messe solennelle (Orch. Version): III. Credo: a. Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebaa1c4a0b43045da1ed25d48741dec22459af249b1c73fec8c86cb6fb758eb. 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/NLA509411710.
Petite messe solennelle (Orch. Version): III. Credo: b. Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe950dbf319cefe2a9b420ee4090448949369bb2c838275f817f52b14893fb800. 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/NLA509411711.
Petite messe solennelle (Orch. Version): III. Credo: c. Et resurrexit – d. Et vitam venturi saeculi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeac68b306e669890df800b5a4ca9a0c1225ccb744bfe1aac2f97d53acd43711. 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/NLA509411712.
Il Re Pastore, K. 208, Act I Scene 3: No. 4, 'Si spande al sole in faccia'
Orchestra of the Royal Opera House, Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb43bad5ffeb0fd6743aadd1bfaf1bae1c4dcfbd41dccfaba927ce52becd17204. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBAJU9100403.
Il Re Pastore, K. 208, Act II: No. 9, 'Se vincendo vi rendo felici'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82464707fd9bb8a81350d87625af11807f9d81977e89f00b09e5bfa81959d28. 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/GBAJU9100404.
Don Giovanni, K. 527, Act I: 'Dalla sua pace'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac12e40d1d6935d5d699f384af5882f74fd6ad6173bb42ca5a58a6c0717f49ad. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBAJU9100406.
Don Giovanni, K. 527, Act II, Scene II: 'Il mio tesoro'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618457043bfbbc25e35f2994ee53cae9864d10e5a67fcb2d0a80a1b28aa12742. 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/GBAJU9100407.
Così fan tutte, K. 588, Act I: 'Un' aura amorosa'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbebe2460020b113cb08e152a011d9d1fc2cf0068e8b3e2f543aa0f6c682270a. 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/GBAJU9100409.
Di Zauberflötte, K. 620, Act I: 'Dies Bildnis ist bezaubernd schön'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eec38c8ba0421a317ed0894de93b48032b9e955aeea52251eac9e848fea308a. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBAJU9100411.