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 0xa0c4dd0d0725f4ddf3630ebd3ec8026c6289bcba149c219c517228c208b001b9. 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/c93d1e8d-86de-4f84-a5fa-fdf080b4755d.json and https://artists.proofprofile.net/proofs/artist/c93d1e8d-86de-4f84-a5fa-fdf080b4755d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Petite messe solennelle: I. Kyrie. Kyrie eleison
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 0xd3c3de622f47aa8732dcf1bcff0fa84b858af8e7b50516c8f8bb2d59f2342517. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR46Y2149401.
Petite messe solennelle: III. Kyrie. Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37fd0201c198bf90509720b49477e2da55d3ed34209a5fb7e6fb159c2548f76. 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/FR46Y2149403.
Petite messe solennelle: IV. Gloria. Gloria in excelsis Deo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92da9586ae50842343b66b992cf025060c59265aa44f0e88b902cc7e8ccaa2d9. 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/FR46Y2149404.
Petite messe solennelle: V. Gloria. Et in terra pax hominibus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5376345cc92f9e526654de54aadcb83559579ed635373a4a88fbca2ed0addf1c. 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/FR46Y2149405.
Petite messe solennelle: VIII. Gloria. Qui tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b99b0f8cdb31bf952748b79143d8c01ec7de6688422154c348a0f2472e1eec. 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/FR46Y2149408.
Petite messe solennelle: X. Gloria. Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8506d9a2e76fdd18e55c2cfd6d8fd65f238fc3f977eae9f893cef4e0b9a0a247. 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/FR46Y2149410.
Petite messe solennelle: XI. Credo. Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f3c5e6c21d1da6db7a57b814fa7fd87f479b79482f8c15b75d68f35f35b7eb. 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/FR46Y2149411.
Petite messe solennelle: XII. Credo. Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24d4125608d0c28e54d4333e98a36bed431b6805900618ea9c8961a6545406c. 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/FR46Y2149412.
Petite messe solennelle: XIII. Credo. Et resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffecf596f623286f23ac41d96593c4661fede3c82d9144f254a896e1b02e969. 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/FR46Y2149413.
Petite messe solennelle: XIV. Credo. Et vitam venturi sæculi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedab02ad28b9d205126cd602f03b4aec050e3dc3004abfb33f82f40a9aa38d66. 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/FR46Y2149414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e74ae454271d52e57f0c8fe15c9a5e0f5907580e3bb0f39c0afa50548f53bb. 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/FR46Y2149416.
Petite messe solennelle: XVIII. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb2ceb50e85b4d19d080d7c00aa0c13ab5d722769469f0c9879a96fe7f735b7. 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/FR46Y2149418.