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 0xc4c78031a2fca97e57325b9ef6fb84ce08dea545a11c8037d35be9afe2df105f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9b9afbb-5b36-48da-b68a-71c7c5ed575e.json and https://artists.proofprofile.net/proofs/artist/f9b9afbb-5b36-48da-b68a-71c7c5ed575e.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 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 0xc8083f82e201e6bf4ff4f63b884c84af5a9c96ac7b4fbcfefd196e8ec9d57520. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/FR0O70789487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f599f2c2f0efbd2325c238e750ea4a6269f99d5eb669e626b5986e9bd4147d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR6V80374493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bad986fdf630161d9214488b0907c243b6a22f1839b315f04e9b873bbf53ffe. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/FR6V80374495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x218d2de2d0975771610663e7b567155112b0c15047ddf908c80cd2f268afdda6. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR6V80374497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ae295156c830fd31576ee313ff308dbe16334b88acf9eed0e4bc9b6c0b4af3. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/FR6V80374503.
Twahchtk wahya lmima (Soltane Attarabe Achaabi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c14a68b0596fa41469e841b62b9cb7198c50178401a9bb3cf5ae7a1b0746ed2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR6V81644169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07066983b21147f0c796bacc1b9df6a55c088731f563a5c60044d5c75c6f29db. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR6V81644173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7663fbc877d5cce4948332cf1317b69117ff4cf6ebc3e224865d3e38b5288e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR6V81644174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x471156cdf0aff02c2f1f01052a752568912ccb635e633031fab3bf73294da556. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/FR6V81644178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9cd323657f746ad5500030da13b6504a96fd2ea9cc8b1821b07772b5de0adb0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR6V81644181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c5b45f3af8e150f8f7b82914df020789e10e7b170b90db3eba1510c6ab384. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/FR6V81644186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795ff235a1f7ffd5eb01d62d7cc0cfa8d94cfcfee41c11e327a225d9d18fd136. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR6V81644187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44490c7bbdf6285916fc94ac9082eb0bed016fc724ffecae5ea21538dd6995be. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR6V81644191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142d945f8a00ef36999d9f5db68cb0f29a2bdd57b493f1e7ebeedd0c7b29958a. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR6V82503425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476f5f3802379b5d11da6e78372df9fa2dfe491bd73bdf1e1759af843941128b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR6V82503430.
Rjaf Allah Yal Khout (Sultan Tarab Chaabi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3b05bf3e76839ca17b8389088b7be6cbb147944e22d5230e80fe61a042a218. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FR2X41650839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b9b75131f7e017e0b0e90f645745f576040d51286346da0ed210a3b6e921e2. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/FR2X41650842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5546873cebc08b88f92f6e53cd352b440279e3ed95a121145a9411c56cf2ff6c. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FR2X41650844.
Arkan Al Islam Ft. Achraf Soltan And Karim Jawhari
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e94e3fefedc15e420d47c99cb9ffcd647ce6d7ab0797340410e1e4945e73725. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/AEA142212132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a14c074483070f95934806dd69dee5ab77b895ba94ff7f5a626d4d2eafd72fc. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/AEA142401353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c49931b417110aaa92e3df35bb45cda32225bc495679446228559ba90dff3c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/AEA142404917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392d5ecd2bb10b34df6cfd97f8f2ce08f9f9b78108b1cb2ce8636c673b293885. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/AEA142500378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7be5d46fca577329aa8ccca8b79936d635d2cf214b4d56f54b694d3af458f4. 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/USUYG1447802.