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 0x0c9db550ba6de1c9b7355d3866da2870fd7027a50830b6d2bdd9b6612ecebdf7. 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/d43df49a-c7fa-44a9-9f03-35b4d4f80b93.json and https://artists.proofprofile.net/proofs/artist/d43df49a-c7fa-44a9-9f03-35b4d4f80b93.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 0x5dd3e675496c615f1995ca12a70ccebc10a4b3d08dc4b4afd6fbffcf6209bcc6. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/FR0Z51000577.
Gestlude 2 (feat. Youssoupha, Soprano, Deen Burbigo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893a7b4065826e1428b11671eff715b3fe595d21e88b0c7dffbd891b9b6516f6. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/FRU781504015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c878ef5c5841866f0a9a47f3fab8002bd60a940380ad72be09407875159ed1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRU781504050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c6181d0180365321ece54aac0997503c9e43cf571345484010f10ff0aaabc5. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:21:13Z), 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/FRU781504060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb74a742671e5baf543155a0137b19adbdea287205cb7e2facff1ad38c9a4dd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR0U91700222.
All Eyes On Me (Extrait de la BOF de "Taxi 5")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ff7b2d61bfb09ea9b3baae1f966dd0e9d1cbe8e4a4ce1dd4807c34fd96879b. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/FRUM71800512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd8530a08414305e9278a0c8e8b6a90dc6e9a5614fb94e865aadaf1f89e852b. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:03:46Z), 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/FR9W12004024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a6c784e24a247b30f4d5fae9fa0606c05f14d6e2c988ed035c710bda80ee2c. 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/FR8FB2119700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725c88209fd37597c042756f59321cdf04671068d3c82f1583cf775e60fc8bdc. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/FR8FB2122800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8943a70f8ad7eb9d6c6abdd9bfaaace90217d4c444a62bb69f95ded3fa861a. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:06:30Z), 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/FR8FB2123100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d74e05c0cf48fad59554c9370df0e60566858fa71fa8fffb9869489021100b. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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/FR8FB2123120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfb813c918e9a035dee3b02678158189cdaee26d3c6d6c025ed70addafe90be. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR8FB2108100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f7e8fbba692b69c1e3f5e4705a5dc66a2daadd9fa81be5de9b4a72a0d90b127. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FR8FB2123130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a6c784e24a247b30f4d5fae9fa0606c05f14d6e2c988ed035c710bda80ee2c. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/FR8FB2119700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9713c7b6f9e530c95f21e3f2f6e982ce7050714bef6abffeb08d3071b42007. 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/FRUM72101528.
Les vrais savent, Vol. 3 (L'anthologie du rap français)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cad8cede6a5152fab7410380e4d49712fa115962b3ec91e80b9efee48eaded. 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/FR1Q31400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f7be6c5f5c4c1334d33f588f40ee73b4fbe58799330c64eaaaeb85091a6468. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-22T01:15:38Z), 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/FR4V31200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cd834d035d6f457edad66665ccbdb944c3983ebe87c6e4923aca28e2e93cb5. 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/FRUM72101784.
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