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 0xb76a2daae47f2c0bba61b9f7bfc65df4f705a90b772731da503923f9f127c584. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ed9abe4-a01d-4329-9d25-b5e428d1f5d3.json and https://artists.proofprofile.net/proofs/artist/9ed9abe4-a01d-4329-9d25-b5e428d1f5d3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Ti star nobilé é non star fabbola (Le Mufti, les Turcs)
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 0x15660dd03fd6302c34df0ade7267f516d3b456587b0f8777e25db3385fe17bc2. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FR9W12137028.
Dies irae, LWV 64/1: IV. Inter oves locus praesta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6613204be91f71f795c0d1f00a5dde4af802d9c4be8d3b1a8807bfbc0ce6f057. 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/FR9W12033448.
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Dice mi Turque (Le Mufti, les Turcs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0464a01ec66cf2647c2f78a5f810b090263e6ba9c3007e150a43354036dc209. 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/FR9W12137024.
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
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Mahametta per Giourdina (Le Mufti, les Turcs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e43b6714d4ad14b9a996274e57025319df4f157f5843ef77c34b2acb5e4c050. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR9W12137025.
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Ti non star furba (Le Mufti, les Turcs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce47b9350b13ed217cfd69ac71452db140819a3aac0deeee75c9dd61b91459bd. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/FR9W12137027.
Le bourgeois gentilhomme, LWV 43, Act IV Scene 5: Non tener honta (Le Mufti, les Turcs)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb9b9513b02feae4ff67b05ba70e1048a14c853646539ecf9b45151d5f910f2. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/FR9W12137029.
Le bourgeois gentilhomme, LWV 43, Act V Final scene: Le Ballet des Nations. Première Entrée – Le Donneur de Livres.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9cfd8f32beefa65b5b3c64a869ceb45d605642cf6b0275800e165320dc662c. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FR9W12137030.
Le bourgeois gentilhomme, LWV 43, Act V Final scene: Le Ballet des Nations. Monsieur, distinguez-nous parmy les Gens qui crient
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc38c52bf8e5b5858dd9d06379d7d2e3d5545dd06a23cd618d5dc4e742a4a6ce. 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/FR9W12137031.
Le bourgeois gentilhomme, LWV 43, Act V Final scene: Le Ballet des Nations. El dolor solicita (Second Espagnol enjoué)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8168aaca1ba79fac282f8ea247e9abbc70c59f5ff9ece7cd23acf7323e4dcad9. 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/FR9W12137097.
Dies irae, LWV 64/1: II. Liber scriptus preferetur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc0a0be0ab15a43901bca0cde17bd2fca017f229750e4a2318c532e66556938. 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/FR9W12033446.
Dies irae, LWV 64/1: V. Oro supplex et acclinis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ccf3c228f3aadbe78df0c0c4bedd53ba0b6889a8e7e4e6129db0472c37ffa8. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FR9W12033449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cf41ce16c97e2d2e6cdb6c694d868654e7979cb8d002e1c68f8fd588ddf169. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR9W12033451.