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 0xfefc5c16d7a02fca94697c1b4a4947d4cfd9033e00707e83cb3af0497efec27b. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7ea11ef-e066-4991-a408-36f446ef415e.json and https://artists.proofprofile.net/proofs/artist/c7ea11ef-e066-4991-a408-36f446ef415e.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 0x4ad74030e9df36fec32424875717e165a0eb4f1d88c940210285c026b96f6006. 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/FRPZ92315050.
Delibes: Les filles de Cadix "Chanson espagnole"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe520ef0f15fc27b69d822a4fe13b79af729138b2078b69d1486405034de365a. 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/FRZ119702200.
Verdi: La Traviata, Act 1: "È strano! È strano!...Ah, fors' è lui... Follie follie... Sempre libera" (Violetta) - extract
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a8c1f75397c6c9a4872fc7e1cca01ba4a55f1e48105ff5db8b280f1fab517bb. 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/GBAYC1402657.
Mozart: Die Zauberflöte, K. 620, Act 2: "Der Hölle Rache kocht in meinem Herzen" (Königin der Nacht)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ec0b89538f34053b6e509ac547e72893826c351a50b18edebd74710d47dbc5. 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/FRZ209506903.
Les Indes galantes : Les Sauvages - Danse du Calumet de la Paix et duo Forêts paisibles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d893b0ea571863417956793c4c3c63f5ff4928d80b7050b5948fc26ebe7bf2d. 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/GBAYC1105237.
Arlen: Somewhere Over the Rainbow (from "The Wizard of Oz")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f16a294e766c6d79be065237fb3550be0c3f23f911119f0b9a3efe8bbca1767. 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/GBAYC1001220.
Legrand: Les moulins de mon coeur (from the movie The Thomas Crown Affair)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eb9ba3c735bdcd67ce80a9d5f202d86875d01c933eed028e77f851b72dd745. 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/GBAYC1302306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb143ff97501fba687136e4d48620b0a6a41ee1e0a55a7988d625d0f40b458144. 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/DKES20800902.
Legrand: Chanson de Delphine (from the movie Les Demoiselles de Rochefort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb42914de72faf0c206d15a9e248db5c13f126184caa2deb0984d9425fc8a1e. 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/GBAYC1302314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ed8e4fa8a6c0838ca419aea2129f0878edd4a83c0e9cadb033686176f742e7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:54:08Z), 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/GBAYC1302301.
Legrand: Chanson de Delphine à Lancien (from the movie Les Demoiselles de Rochefort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762ad9d5b39be5fe5ac26226253911ac7fd471354658546b9f0f4cde529f1f25. 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/GBAYC1302302.
Legrand: Papa Can You Hear Me (from the movie Yentl)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda92d7476630ed75807c5c74a8953468185b538125062fbc5d66bd323e98a86. 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/GBAYC1302303.
Legrand: Cake d'Amour (From "Peau d'Âne")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ded6dd29d562dcdc5792cd954865696e7888187df2d030d0bb099a3bac9a13. 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/GBAYC1302304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30eb9ba3c735bdcd67ce80a9d5f202d86875d01c933eed028e77f851b72dd745. 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/GBAYC1302306.
Legrand: Nous sommes des soeurs jumelles (from the movie Les Demoiselles de Rochefort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233b4d672161a85c59b233ce3847f8ffa03bbc129afb5f0774eef37d22ba828e. 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/GBAYC1302316.
Legrand: Duo de Guy et Geneviève (from the movie Les Parapluies de Cherbourg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cac11be2be2ccdc80ed6cbf75b4808537a5c7047abdea8d7fa0cfa60918dfb9. 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/GBAYC1302311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb5dbb0c57df4c92f936bbad39c1bf821fb036e360888bbaf7909c8ba0249c1. 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/GBAYC1302313.
Legrand: The Summer Knows (from the movie Summer '42)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c1fbb8935204dba1626bba75decd0d9eaf72cb31e5a44a33998f875c568141. 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/GBAYC1302315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af728e320b87781652fcf54a30b3ef23fa891b0f66023a86bba59ee53a76787. 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/FRZ131713130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfda4ffbc2337f9232ecafb9966b0095511f132a5d2590f4aa6a1e42b3463d17. 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/FRZ130600650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03272af07631909a2712a67f0f1523447cc1d6e2d059b6c2e015fdcd5e2c2a2. 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/FRZ130600690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398c5eb95a1a18006d72b99e0b0facbde4b59b820a7f44375c8bf77b24428f77. 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/FRZ130600760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x178051f7b0f6cf3cd77ac2653af825a877667da9c943107837f57573e5e402ba. 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/FRZ130600770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3823965f3db4817c3adf3fc34a6abf466c2ea9c8987609fdfcf96a0e73da08f5. 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/FRZ130600790.
Jazz Manouche Anthology (The Very Best of Gypsy Swing)