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 0xe4bd7c249f58ea6d0fb7767de4b6010d5062b16ca7bf4001c756de995474c50e. 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/8ed0bf39-b58e-4c21-b0d4-80f4f3f2ace4.json and https://artists.proofprofile.net/proofs/artist/8ed0bf39-b58e-4c21-b0d4-80f4f3f2ace4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Missa Assumpta est Maria, H. 11: I. Kyrie
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 0x23763c66d703f93a536e2f562e6cd0552fe4a472a771f2601ce34e2479d24a12. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FXR522415001.
Missa Assumpta est Maria, H. 11: IV. Kyrie (Reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ca0277c893d6cf5364fb3d0a5e34ae4400fda0cbc5b7c6c8737a7116c0142c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FXR522415004.
Missa Assumpta est Maria, H. 11: VI. Et in terra pax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2496a9e0658f15279f49380a514eeda6c4ba422de6ef80c4b048bc6358fcee32. 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/FXR522415006.
Missa Assumpta est Maria, H. 11: VII. Domine Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e048a232687fe03f0fed2e31fe9c1eb34d1ceaa8b4aec6077deaaa761a05489. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FXR522415007.
Missa Assumpta est Maria, H. 11: IX. Patrem omnipotentem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b507f46b956158ee191972fbaf0bc912d18deb7195c8510ad087f98a0d2e86. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FXR522415009.
Missa Assumpta est Maria, H. 11: X. Et in unum Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d28316cb9acfb8586889c323211bc1d16401a749fc949a4da08ed28c5b7033. 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/FXR522415010.
Missa Assumpta est Maria, H. 11: XVI. Cujus regni non erit finis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a04630963eb4506c41e7cbd3cb734cba2490265bafbff7a0ea6ae661f431a0f. 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/FXR522415016.
Missa Assumpta est Maria, H. 11: XIX. Et vitam venturi saeculi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ef4ab6731f5cab02cf402c8644e8f67d83846fde1e0f4b74cd21f02be65a58. 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/FXR522415019.
Missa Assumpta est Maria, H. 11: XX. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd782078a1cc14fb3abc39905a17503eaf665de3dcc32acc6309e71e8fa479ada. 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/FXR522415022.
Missa Assumpta est Maria, H. 11: XXI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ea685af0435152483973b6c9dd1757a2314262bb76619ff3e10ac0bb0473fa. 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/FXR522415025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0928cd9fdff7fa09026c0bc6107ada29267496c752741712bdecb82f4cd373b. 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/FXR522415026.
Motet pour une longue offrande, H. 434: IV. Pluet super peccatores
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2c17dd4735ef03495a8607b84a03376d5ec9ccb57c7a1a0a865070389db2b9. 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/FXR522415031.
Motet pour une longue offrande, H. 434: VI. Pluet super peccatores (Reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8cbda81adc23b3c03d6f31021fad752c281c9d4e081d305ab0afe0ebb54b08. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FXR522415033.
Motet pour une longue offrande, H. 434: VII. Simphonie, Deus Justus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf1181e1e7c66cb263458f9aaae7299c96dd1a802e62d42b8ae01bd4d3d0681. 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/FXR522415034.
Motet pour une longue offrande, H. 434: VIII. Simphonie, Justus es Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe343dba2d8f9433ddb98efffd860f52a2c55a4430655aa41b692089f026326fa. 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/FXR522415035.