thumb|Jennifer Larmore at the End of Year Concert at the Auditorium Maurice-Ravel, Lyon, France, in 2013 Jennifer Larmore (born June 21, 1958) is an American mezzo-soprano opera singer, particularly n
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 0x22b8807c073d8e56ccc1d679545dd6cfd425bfa97e5f2d4d2802c746b940a9bd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eaa22338-3a3f-433e-b1b7-c4d44fd2df15.json and https://artists.proofprofile.net/proofs/artist/eaa22338-3a3f-433e-b1b7-c4d44fd2df15.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Rossini: Elisabetta, regina d'Inghilterra
Mercadante: Maria Stuarda regina di Scozia (Highlights)
Handel: Serse, HWV 40, Act 1, Scene 1: Arioso. "Ombra mai fù" (Serse)
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 0x60000545c94712a44eb9238a1c6398b95f50f565446c4fa4a2d682fca703fed4. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEA809431600.
Offenbach: Les contes d'Hoffman, Act 4: Barcarolle - "Belle nuit, ô nuit d'amour" (Giulietta, Niklausse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433cdbd959a88dc9658d36c95320f03a7b0776743c528513549f04f85bcb60d2. 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/DEA809809001.
Delibes: Lakmé, Act 1: Flower Duet - "Dôme épais le jasmin" (Lakmé, Mallika)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d777f3855e8fada7bb6e40faf3edf158b2bbac3fb97393fd0db0bd3a5a04c7d. 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/DEA809809003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1127d96aa11e4e7362cc02519151b5b396e4891a0334e49a4f827683efe4d0b9. 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/DEA809646800.
Orlando Furioso, RV 728, Act I, Scene 2: Alza in quegl'occhi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e33d54b1dc62281135b23e12880deda579083fd104819a5dd92dba69f9bac68. 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/FRX290400300.
Orlando Furioso, RV 728, Act I, Scene 13: Amorose ai rai del sol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21da748667a522224248c9a599015df94615970b20765d2dd83fb320e5767111. 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/FRX290400500.
Klassik 100 Meisterwerke: Klassik die man gehört haben muss
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60000545c94712a44eb9238a1c6398b95f50f565446c4fa4a2d682fca703fed4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEA809431600.
Orlando Furioso, RV 728, Act II, Scene 1: Vorresti amor da me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d16072f32d85a5330e596d86eb3c5d4a0d3683a1d0b7f33237096cde947b5df. 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/FRX290400520.
Orlando Furioso, RV 728, Act I, Scene 11: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d349769c38e95c411bcb0e57a7f380d4b36fdde5277b999bd541d3088dd9268. 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/FRX290400460.
Orlando Furioso, RV 728, Act I, Scene 1: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3320d1e3e9e88fcccf134c4ad47e5fcd541445e4bf86dd9155329202f2f9c8b4. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FRX290400270.
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
Orlando Furioso, RV 728, Act I, Scene 2: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03f39fdf5bd1441219e43a3bc2ebedfcbab9a1d7be52680d846739e153c0943. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FRX290400290.
Orlando Furioso, RV 728, Act I, Scene 7: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8f33c9be53b0badfcab797d873293d5342172aedbebcb47b09670fdd1a716c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FRX290400380.
Orlando Furioso, RV 728, Act I, Scene 9: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae28629db26be3e38640ca551e4dac26c37be83af8970869d1e3ff34685cd9c. 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/FRX290400430.
Orlando Furioso, RV 728, Act I, Scene 10: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3ee58af14e6176b91c52b1c264bf88d102d773ca2c5866ea8fe38acc09f70f. 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/FRX290400450.
Orlando Furioso, RV 728, Act I, Scene 12: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8891a94c574af694b31758eccd4dba3830ffecfda4f8e3f2aec135100948d7. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FRX290400480.
Orlando Furioso, RV 728, Act I, Scene 13: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea657017f4f1ad79d084bff6204988d721e244b6e1c64609d64949aa671e3fbd. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/FRX290400490.
Orlando Furioso, RV 728, Act II, Scene 1: Recitativo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d991223d2cd1afe8cf33e46713b6d362ae7682bc0f70652e7fd775fa04030b. 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/FRX290400510.