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 0xaf071079da46e3e661355355a518e11b7813a469199d931c5650adbd3ae05cba. 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/ac8c88ef-98cb-4938-a6b5-fc71d66ff904.json and https://artists.proofprofile.net/proofs/artist/ac8c88ef-98cb-4938-a6b5-fc71d66ff904.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dvořák: String Quartet No. 2, Bagatelles & Rondo, B. 171
Bagatelles, Op. 47, B. 79: No. 3, Allegretto scherzando
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 0xeac4eb0fcad8afb23b16950720516f46854a1553812ae47689b5a269127606df. 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/HKI192314603.
Bagatelles, Op. 47, B. 79: No. 1, Allegretto scherzando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d3a15225f4b67737832ab210d41ffbd4a93a10f6635d2f2528de80e27db67d. 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/HKI192314601.
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
Bagatelles, Op. 47, B. 79: No. 2, Tempo di minuetto. Grazioso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa791c17631566675a1c3152f54277970ee4c574d113a418ab6b2ec2df45c1155. 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/HKI192314602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00dae00effcbdade91d210e768d90bb1c4d25306cb5048028cce3f4153b3940e. 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/DEC291156701.
Drei Motetten, op. 39: Surrexit pastor bonus: I. Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838501961164e0cc35997bffb400acf0d7b907fa5ca09d15b4bd6eaad4466088. 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/DEC291156717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd8267e99e3c87a251ce3d6cb63a25f78d0f4a15313bce36a8b381f03eba58f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/DEC291156714.
Drei Motetten, op. 39: Laudate pueri: I. Coro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc37256e6c2db5b68a4bba14f41706a248844465059b4204d85cf6af67774a70. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/DEC291156715.
Drei Motetten, op. 39: Laudate pueri: II. Terzetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb617a281bc6ebb031cefa70e541e79746cde79d32b1e9c5fc9322116ad541e52. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEC291156716.
Drei Motetten, op. 39: Surrexit pastor bonus: II. Duetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d2db31457e0fb763bf5bf3df5179a563fe13ede91b0bd38c4eeb85a1b80859. 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/DEC291156718.
Drei Motetten, op. 39: Surrexit pastor bonus: IV. Chorus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d1de95b66eeb343efd8c98c23df7342c745a1e4d07032313b13a99661aa125. 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/DEC291156720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875bf0ce81f795b89d8eec3b03cbac3cc30cacd3d865d45ba05c7bd4acf0c5e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ140011010.
Petite Messe solennelle, Kyrie: II. Christe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3da3003c220606cc709dfc2ea2e49b2ec70b87944a863ea6db57433ccc850a. 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/FRZ140011020.
Petite Messe solennelle, Kyrie: III. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc41a37ae84eca5d6ac3a1a141bc7bcc76c88c6aaeb2451a5e93925eefd9a3351. 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/FRZ140011030.
Petite messe solennelle, Gloria: IV. Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d4e3ab12b550f715267346dccd9c47c328d8f1ec70f524584d0d6676b25077. 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/FRZ140011040.
Petite messe solennelle, Gloria: V. Laudamus te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa698c724dc257b400a7a8be22a0d15e156b719e5c922c9c5e82b46c77758b2d. 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/FRZ140011050.
Petite messe solennelle, Gloria: V. Gratias
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f4d5f8912e3e3a203b18e6d1f39f1ae48d244f387c5fcb4399c54fbc3f487f. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/FRZ140011060.
Petite messe solennelle, Gloria: VI. Domine Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa202f8dea01b9cccb79d565ab93dd32b5e9936ae64f8cc7d856368fe7768bf27. 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/FRZ140011070.
Petite messe solennelle, Gloria: VII. Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca37a077d7b603654fb852b3bae60821c4e8d8112f089edea75e3e3636163bb. 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/FRZ140011080.
Petite messe solennelle, Gloria: VIII. Quoniam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67aa6535636f4f6b98f8860eada97325c85c1e591dd7aa44ebbc91b2f3d748b9. 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/FRZ140011090.
Petite messe solennelle, Gloria: IX. Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cea5acdaafeeac5d84beb67a3b7340804c83399aff42485e383533bbe5fea41. 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/FRZ140011100.
Petite messe solennelle, Credo: X. Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115302d404a61e0bd2ac506d85db2f25cfd261e16ff69fada007074c1b02cd4f. 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/FRZ140011110.
Petite messe solennelle, Credo: XI. Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafdf9ca8b728db79dddf6b2ca119bcb70444ec7441c298a9639f8367f6a545f. 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/FRZ140011120.
Petite messe solennelle, Credo: XII. Et resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9d7db1926013a3301e2a92853978f656997724b7b5ea72ad415360f9d7d6ff. 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/FRZ140011130.
Petite messe solennelle, Credo: XIII. Et vitam venturi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228cd48cda6b87d751e9f35c7217fa9b80faaabee6c882874a0fe5a35e0248ec. 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/FRZ140011140.
Petite messe solennelle: XIV. Prélude religieux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdead9152a52d9323af965cabc361eef1d5929cc465534a979e1b60279df50de3. 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/FRZ140011150.
Petite messe solennelle: XV. Ritournelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead752b7fdb4bb64ff03cc92f274426882e9b1f92a6eccb8d0f743e1cca50dc4. 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/FRZ140011160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee7b3c75691dab5ebaeb84a689a1a78d2044f37e5150545e76b2caca5218959. 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/FRZ140011170.
Petite messe solennelle: XVII. O salutaris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26af7546b253bbd63ec2ea43c280948b2429aaf3fa40bc134c3db5a16ae331b6. 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/FRZ140011180.
Petite messe solennelle: XVIII. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2387a6ccc3f5aff8adfc89c05881b046e679a72fa24f6f1c15024c6a36dc839. 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/FRZ140011190.