thumb|Claire Lefilliâtre, in le Festin romain, concert in the Spanish Hall of the Prague Castle, 6 August 2013 Claire Lefilliâtre is a contemporary French soprano specialising in Baroque music repert
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 0xbae3e5bc8b7416d41447fed7bbaa7af1f96cfd94d7db28e59d3a26c9d1c7903d. 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/40da5cc6-9943-48ea-acc8-edf30d157ad7.json and https://artists.proofprofile.net/proofs/artist/40da5cc6-9943-48ea-acc8-edf30d157ad7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Clérambault: Miserere - Couperin: Leçons de ténèbres (Recorded at La Chapelle Royale du Château de Versailles)
Miserere mei Deus, C.116: II. Quoniam iniquitatem meam
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 0x941bdf2888594e1b1799e8cf5eeb2efa6db002889f4ce0f15d8088d00fe5e699. 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/FR50X1395702.
Leçons de ténèbres, Première leçon pour le mercredy: I. Incipit Lamentation Jeremiæ
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9b7b300b0b2add578f852a4039870cb26c38b8154bada6c55a6e2bf2c2523e. 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/FR50X1395707.
Leçons de ténèbres, Première leçon pour le mercredy: II. Beth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38779c1b4fcf2d8d3c91d6f8ce54307026841aacc90382209a6458ecd834e511. 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/FR50X1395708.
Leçons de ténèbres, Troisième leçon pour le mercredy: III. Lamed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x718d97a3602059cae7883fa5581954674a0c1fa5254027e534b02a88269f94c2. 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/FR50X1395720.
Leçons de ténèbres, Troisième leçon pour le mercredy: IV. Mem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b3077dcdf40dc3c0aa85418861b5aa9836283baa9f0af1a25bb82901afa52e. 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/FR50X1395721.
Miserere mei Deus, C.116: III. Asperges me hyssopo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec54c9168e4572bb0cb90596ed0dc20b9853c998d7aae9924e5a0bfe1096222. 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/FR50X1395703.
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
Leçons de ténèbres, Deuxième leçon pour le mercredy: II. Zaïn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06205f5f813578c48f9d9562c4b327cc9c589a019f7dfb75abf448b49b09b9be. 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/FR50X1395714.
Leçons de ténèbres, Deuxième leçon pour le mercredy: III. Heth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a9da2497537dd7058c5c6aba40bc2b31eb16760bc0cbe931344369d173a968. 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/FR50X1395715.
Leçons de ténèbres, Deuxième leçon pour le mercredy: IV. Teth
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59a6bc25ff21e3b4b635cf9f057bcd42a187e7a86e66c89ec57f6ba49b3726c. 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/FR50X1395716.
Leçons de ténèbres, Deuxième leçon pour le mercredy: V. Jerusalem, convertere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e300210fedee359ee168c830ef4fa3524d830ad5bd4ffdaa3aae28ac809580e. 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/FR50X1395717.
Leçons de ténèbres, Troisième leçon pour le mercredy: I. Jod
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fa875b3039abb9eb989ca6684ee55bfd517d0b6d8487031e36bb5911722751. 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/FR50X1395718.
Leçons de ténèbres, Troisième leçon pour le mercredy: II. Caph
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047b7d47db864f711f6e9d939f05d55689b1449eab9cab224878233b75973b7d. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FR50X1395719.
Leçons de ténèbres, Troisième leçon pour le mercredy: V. Nun
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf847e92d50b9caa16669fb6eec0886d3ec0ba9e5b08d09b7d6546ba423d590b4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR50X1395722.
Leçons de ténèbres, Troisième leçon pour le mercredy: VI. Jerusalem, convertere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec0181c467339488d478eae6af5d36f676cea7d20b928b5c012a1f6a39cb099. 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/FR50X1395723.