Pierre-Étienne Piestre, known as Eugène Cormon (5 May 1810 – March 1903), was a French dramatist and librettist. He used his mother's name, Cormon, during his career, which lasted from 1832 to 1878.Wr
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 0x1e449da38a59976abd4d321ab491b90af4b9a5f64d3245a99b32c6e14fb8d8b3. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c65211ea-3ec5-45e5-85a8-efced5f860f1.json and https://artists.proofprofile.net/proofs/artist/c65211ea-3ec5-45e5-85a8-efced5f860f1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Twelfth Night, Act I Scene 1: If Music Be The Food Of Love, Play On... (Shakespeare)
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 0xd6161fe9c0d6b5d2657f5d73c95dfb76237e8060c72c7b51bf53bb095ef2d396. 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/HKI199201601.
Romeo And Juliet, Act II Scene 2: But, Soft! What Light Through Yonder Window Breaks? (Shakespeare)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22c1e1817d12e87ec2e5338784525e5ba8f1373ac19c96f481e4bffa02c6b28. 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/HKI199201602.
Shall I Compare Thee To A Summer's Day?, "Sonnet XVIII" (Shakespeare)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db3fe452ee40bc55810e030dd6033844e2056ca49dc7e5cad7f7e5a067b0090. 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/HKI199201603.
Doctor Faustus: The Face That Launched A Thousand Ships (Christopher Marlowe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a5b12039d48378625f9f27145abe6b44145d4872096b41ad912e492d5cdd95. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/HKI199201604.
The Passionate Shepherd To His Love (Christopher Marlowe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3529efc64b422f47fa038b421b25059d35c99f425d631632e1c8afb0f1355d43. 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/HKI199201605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5910fb0dcc6df817af6b50cf571129dfeb8b79539441574a5e6d6450aca6759b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/HKI199201606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e783b821b8d51d6c9b90d44a1c683d78cbff34df0309e76b6c7c1335c531cb4. 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/HKI199201607.
La Boheme: La Boheme, Act I: Che Gelida Manina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf85e8c3807b32883cf14b54356de440adf6f5b23c809b3d464c54ab3abaf5d8. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HKI199201608.
David Copperfield: 'I Don't Think I Had Any Definite Idea...' (Charles Dickens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe159fec0b642475b8bba67f5f9157455c01f1e7a93c88a098aba3709c48485. 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/HKI199201609.
Persuasion: 'I Have Loved None But You...' (Jane Austen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbaa46c43fcde71ad9b25f77e04dbe7bfb982240c4213952925894a93faa2266. 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/HKI199201610.
Jane Eyre: 'I Have For The First Time Found What I Can Truly Love...' (Charlotte Bronte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc356fdb449c0f8f2a4a35fb33e1657c4e36b5af2b96912bce9cde00ea5a4647d. 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/HKI199201611.
Far From The Madding Crowd: 'Such Women As You A Hundred Men Always Covet' (Thomas Hardy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0e8a6677de05c5516ae6983f436d2c878595b305434b3ae9d4968db1664c08. 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/HKI199201612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23fb6ec95fdc1f40d96a7d404aaf8a349607b0e090aada67357bcf79db78587. 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/HKI199201613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79da779e10d4d62a1cb707c161180ad378469cf48f5c5524a422515d00633f1. 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/HKI199201614.
He Wishes For The Cloths Of Heaven (W.B. Yeats)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e67614e91004f53c672210e740c9124d73f5c7dccbd00b27a631a6af03f5ca9. 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/HKI199201616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03829dfc18cedeeffec1b76b4a6be79f7f2751894b9adaf8c6ee811dcde8fe5. 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/HKI199201617.
Confessions: 'Friendship, Confidence, Intimacy, Sympathy Of Soul...' (Jean-Jacques Rousseau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6110f2726d21b6fb3334f16b75ae5934329821b80186a767b3cade4293ead769. 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/HKI199201618.
Letter From Napoleon Bonaparte To Josephine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7851b0cc47c82e6fe7d8124be26c7b787257f2631d49da471b680401b30b2804. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI199201619.
Letters From Karl Marx To His Wife Jenny
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567acabded6d60683398106d78aa192d84b008b59fb0bbcf8c61d56efcbc401b. 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/HKI199201620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35761d3b419ae7f28e53a6fea1b74d2ed5dfb3cbf526e07313b45dd7744a5fa8. 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/HKI199201621.
Letter From Gustave Flaubert To Louise Colet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f3c1a5129c1b24ed5669d22ac62d2cb7ff08d93616ef2c24c836815dc090cd. 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/HKI199201622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975694625bda17c58c9c933378298a858adafe2c9d884c3f03016d899c1e49b7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKI199201623.
Letter From Rupert Brooke To Katherine Cox
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fe1da0a4ce0fa575dd240a6519eb85bb04dea06c8cb621e7e8de831d5289db. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/HKI199201624.
Les Pecheurs De Perles (The Pearl Fishers): Les Pecheurs De Perles (The Pearl Fishers), Act 1: Au Fond Du Temple Saint
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f0f0fa066cbfd565d1ddc2740f5f2451b9003999aa529736fe2d467b8737b4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI199201625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6547c692f8f6cd4c9007b418ce66453498aa2cc94e4eb5b4806f3870fb3f6559. 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/HKI199201626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d49c2ec2136691ce677c8ab7b5f72e44c5264718613392f6b5b5af9f870632. 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/HKI199201627.
Au fond du temple saint (Temple Duet) (Act I)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1209f3f5e33add30605246847967a833048ee73013093a78e59e234d88a2b07d. 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/GBGRH0400215.
Il Barbiere di siviglia: Largo Al Factotum (The Barber Of Seville) Pt. 1
Karaoke Opera: Sixteen Favourite Arias and Duets
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c459463264a04456d5246cddc669b7f896936bf18119be116eedac576ae283. 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/GBLGL1252289.
La Traviata: Brindisi (Drinking Song) Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26d0ed93b42defe438a4917e6ab501f2366f1e77633df6c5904882a6a45558d. 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/GBLGL1252290.
La Boheme: Quando M'en Vo (Musetta's Waltz Song) Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60da551ffc7661e260538ba02f5f2dc5b0216031607fa442ef547bcd9d4545c9. 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/GBLGL1252292.