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 0x1db60122bbda1cc69e1ec90b6bffa727c9dcfd2eebeb7883611d82b957812146. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c17f86e9-82ef-4c2c-a1fa-66371613bda8.json and https://artists.proofprofile.net/proofs/artist/c17f86e9-82ef-4c2c-a1fa-66371613bda8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d24b91c1744775f5fe042fad79e60652ebcfa5b012bb8faceca5fe8d7fa9390. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T09:12:44Z), 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/FR50X2412901.
Première Leçon de Ténèbres à voix seule: I. Incipit lamentatio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca088aca8d96bc0b3d6728462630f75c01f5057fb8630ac2ddd6af8304c1f79. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR50X2412902.
Première Leçon de Ténèbres à voix seule: II. Aleph
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167491483e15e048e7fe32a4073e27ee5addc934fa0b25c5002185fabb56ac48. 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/FR50X2412903.
Première Leçon de Ténèbres à voix seule: III. Beth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1343132493a7ec5243ce2d527af68e28c239bc2f950ae7275caed4c46462e6b6. 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/FR50X2412904.
Première Leçon de Ténèbres à voix seule: IV. Ghimel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a659d24eef0d915b27c9d6ba1366457437469f431eaecac206d760bd1a46e6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR50X2412905.
Première Leçon de Ténèbres à voix seule: V. Daleth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5383a8480d5cc3b816199ebb11e4c1789152a8ead238a2b1b34d172bb100986d. 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/FR50X2412906.
Première Leçon de Ténèbres à voix seule: VI. Heth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5257feef090f77361c8ff5ee2f6efa27c2d69c0a23413e7fcb750e4233b43b44. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR50X2412907.
Première Leçon de Ténèbres à voix seule: VII. Jerusalem, convertere ad Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d077362cac1f915b07d473f2870f36e2edd2f3e535eb016f9894373dcca62f. 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/FR50X2412908.
Deuxième Leçon de Ténèbres à voix seule: II. Zain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f5d5f58e46981a15df3b6ee0bfefc462fd307fbdab20c41411a1e021419fbf. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR50X2412911.
Deuxième Leçon de Ténèbres à voix seule: III. Heth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c91f597b23e8ea758f97575912d08e610a88672da78d8e2e86ad33d32c0fe3. 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/FR50X2412912.
Deuxième Leçon de Ténèbres à voix seule: IV. Teth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566757f7401440b9dab102740bc10cc7cc648f2dbce39c87c638234b61449a68. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR50X2412913.
Deuxième Leçon de Ténèbres à voix seule: V. Jerusalem, convertere ad Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93468583fe60186afe9b59591f10c16c74c47c44c7cc147b4b4e8fbcf7bfb79c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FR50X2412914.
Répons de Ténèbres: Tristis est anima mea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e31d483b22284558c91e821944a4e46c7fcd9314e4d8386343cb0f4a8990e9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FR50X2412915.
Troisème Leçon de Ténèbres à deux voix: I. Jod
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0824b0f4934b388b3edaa233c6ce90852540c60765549ee18c81b71250d20b0a. 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/FR50X2412916.
Troisème Leçon de Ténèbres à deux voix: II. Caph
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6018796d89276b920c802bd3af7949a8e96d4682dfbbfff313d6b820d99beba. 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/FR50X2412917.
Troisème Leçon de Ténèbres à deux voix: III. Lamed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f33bd03967ce8c407fa82f36d111be655cb0e73e61843fa00d38149a6263266. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR50X2412918.
Troisème Leçon de Ténèbres à deux voix: VI. Jerusalem, convertere ad Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf404e78639242ab3b0533ddbad23ed98080d7907caa1d06154e6f3fb789572cc. 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/FR50X2412921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1986b10a5e7ab15b19457ecd4b9022651d68d13b9cf38284805fdc0bf615e2. 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/FR50X2412924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c642a460982b04555080bc70a8a800bdffb7bf21c5a057cf650d52700cff83. 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/FR50X2412926.
Miserere, S. 87: VI. Redde mihi lætitiam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f65f9562dd3e1cf458fc04a669b92e206e57f345893d6a6f606a61de4666531. 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/FR50X2412928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac684c402b84c9b7dd2ee452b8afe7bfc13e276513b0cae7d9f7c5d2b68aa8c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR50X2412923.
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
Miserere, S. 87: III. Ecce enim in iniquitatibus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f3091099575ec6348461bc7af11e3d2ea597a053cc29a0e1972cd17798020cb. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FR50X2412925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7607e55a440760cdcf25b9ae83ff98cf362bdb7b008f6ccd40f787ca52e1c434. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR50X2412927.
Miserere, S. 87: VII. Libera me de sanguinibus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ed2a139b4aa4325c314543458bc9ae5b28b817039de26e07b287ce76be2458. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FR50X2412929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5122bcf6244dfbcbfb6ca1e196954f06fdbb24590d6f9696fca9f173e279c64c. 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/FR50X2412930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58b5a262829d00f8190bf85554e71bba3eb5152fd6fe8fdb1497862d41cbf0a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FR50X2412931.
Dixit Dominus secondo, SV 264: I. Dixit Dominus
Monteverdi: Testamento. Vespro della Madonna 1643
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ece3b62bd9a8af6fefe79d2eb67bda55b7c74c12a26c745b32afcdb1824d6f. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FXR522414502.
Dixit Dominus secondo, SV 264: II. Te cum principio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0678026a153f5ec7041c15e1022afa5f5f05eb2483ce9fc4decdf1f09b2ab30e. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:18:42Z), 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/FXR522414503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39b4b477676487179f71b2f34caa85f4919c1c1136f43ea587e06e3788d017f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FXR522414510.
Robert le Diable, Act II: Récit et Finale. Quand tous nos chevaliers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9088ef5a802da501134e39eec61a9c36943c568c6223eb9370363e2c67e9f238. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/ITJXZ2100518.
Robert le Diable, Act II: Récit. À toi, Robert de Normandie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f94383e2daf0a96c8640aa2fe539900bd79f8dac7fda679095adb132ac8a92. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ITJXZ2100515.
Charpentier: Messe de Minuit - In Nativitatem Domini Canticum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f4adae0a7b80b9d8c8b132f076dfc847b30aaa8f96379bfe22d0c4a09f130f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR7JM2293090.
Dixit Dominus secondo, SV 264: III. De Torrente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155280f7681ea28f1b7a456a48f012d6f1ea7247e269e6902c3ef06ef4cd8893. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FXR522414504.