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 0x153ee2868ce38823116debe528ce1d453b27eb6dbd122dd0eee49fc8b53c0d06. 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/20c4897f-8020-4a5e-ac98-a7e6726100bf.json and https://artists.proofprofile.net/proofs/artist/20c4897f-8020-4a5e-ac98-a7e6726100bf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le meilleur de Farid Ferragui Vol 1 of 3
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 0x6f5b29ba175c9d7feb4086cbbf1aaa5fbbb4770ca5acef164476ce253a3a2776. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/FR0O70793624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6ccc6f0d6d9f4e2ecf1f4a8a6daab98110f72e0e8cbaf9d7cfb17a6ba354ff. Chain 2 (Bitcoin): anchored in block 957642 (2026-07-12T02:46:48Z), 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/FR0O70793626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b458897230f9741297f045c3ec7a1d42f5ecd66adfa6ddae01d74cfa0566807. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR0O70793628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013066b48c8b7996eb4e1f9d0eaa3a6c51f4665ddb003dd48e9c52e29c1511d1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR0O70793629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067b7dffde0c4b6173a072bceec7c0bae6bfd6db4ef32d93e354875e9c0a203b. 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/FR0O70793867.
Mes plus belles chansons Algériennes, Vol 1 of 3
Le meilleur de Farid Ferragui Vol 3 of 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda541926ddd7862d787b95214492b33a251873a92bdcb102cc9abfe9e930c48d. 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/FR0O70793650.
Le meilleur de Farid Ferragui Vol 2 of 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2ac21e9f7aa99484358fe47372e2ab463ad17ee6741ae84e9119efd8e2a2a6. 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/FR0O70793636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5945866c2135407fa1d44deafe1333f0252a340c652976ac42bfedbbb4bda5. 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/FR0O70793637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12d2c3284c04d57c1e643c729f0ed136ac1efaa50152cc0973766b9fbdafa2a. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/FR0O70793638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31781e1cdad39eb31d0681f9a38846e5a742be0e5ead05e4bb8e6f68c65ff9db. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FR0O70793642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cfa148e7c08c4809be68f723e27df0a26a5c7bd98ea0ee0995ba7ba6720eb92. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/FR0O70793644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde961886fce84ec166b5f52df0b49ada56d1b30a107b2af0f5b2ce057e6228c9. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR0O70793645.
Mes plus belles chansons Algériennes, Vol 2 of 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449b4b7b869dd40d4cb8c458896a855fa5f003b99e584bd6f4649ea97660ddb7. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR0O70793885.
Mes plus belles chansons Algériennes, Vol 3 of 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730fa75e7d9610ed74f6c611ef20c7686d94d468a132610bbc1275519acf00c0. 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/FR0O70793893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98058a59ee52f98fcc15b5a5e6c7e1ab1c015f5dcd46f12c501f50e92a00f9f0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FR43D2301584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769ca470c20deb93d2eb6d8232f2ff6a3840b894c66d22fb4b773afd0ee7f8e5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR43D8100037.
Asif N Tudart (Chants et poésie berbères de Kabylie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2884c1c49c9d7bf3b26edbe278d62c6f0876bf2ce1f71f5f0265617d33f75d2. 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/FR6V80059950.