Dorsaf Hamdani (; Biographie de Dorsaf Hamdani (Music Story) ) is a Tunisian singer, musicologist and the JMC Director. Life Daughter of a violinist, Hamdani joined the National Conservatory of Mu
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 0x9dfa070c13456db502ed34d541407a21f90d4c982a7df6a9f4743edbfa5bb63f. 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/71379e01-643b-489f-8763-4b139effe5c6.json and https://artists.proofprofile.net/proofs/artist/71379e01-643b-489f-8763-4b139effe5c6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Princesses du chant arabe - Princesses of Arabic Song (Oum Kalsoum, Fairouz & Asmahan)
Ghanily chwaye chwaye - Chante un peu pour moi
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 0x89a11c34324838f41b9780d087642954e87a94571d3642a1dcaf25992d3c6c34. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FRV961100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca7f1042c230bc89f80278aedf93fdbf02e3a4edf3ed319bde073293ca195c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRV961400039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef34a8782587368c2d1ce11bd3531c91f31c5cb41955e3ef881d1fc5cc3bd524. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRV961400043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd773683a59b7248ed4cb6ec8c9b598660a64aabc7b16a74810f300053f5714d6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRV961400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1f8d36041e4aebb9e62048f7a1bbc774d2632c623accaa99295b00175ecfac. 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/FRV961400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa008f1f5628d66e4e23fab1cb805b449d59f44789705982d7bc8ac3f485c9a4f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRV961400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f856d5bcee7966c6c89f1ff17ba10b683e81584a0af58bb1089b323426a19a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/FRV961400051.