Wissam Hatem Joubran (; born February 19, 1983) is a Palestinian composer, oud (an Arabic lute) virtuoso, and master lute maker. He is a member of the group Le Trio Joubran. Biography Joubran was bo
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 0x76242000a4099cda0d7133b2eff2ef01272b4a1c6a20fc338117a6ac2c25a9fa. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac17f56f-5fb4-4bf8-9a00-588ddbdd409c.json and https://artists.proofprofile.net/proofs/artist/ac17f56f-5fb4-4bf8-9a00-588ddbdd409c.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 0x9eb11ba7fa34cc4895a58c1958d21513a3f9f0a1848a93edc742765dac769bd1. 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/FR0P12100220.
Mundo Ideal "Ya Araih Ouine Amsafer Tr" - Ya Rayah
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfcc6859b4402196882ea74b7c0a0ae613a1e5d592eaa338eb3aa8521d95b2c. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/FR0P12100230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e5146154142b3eaa7f529ad6119ae78cfebd03699f5851b5288e7ca7300ab9. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR0P12100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a3b05ed154eee21bc744db3072c54fa144493453128f97ddfa4aac07f61c61. 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/FR0P12100250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f7b32ab70e100b5c500d05a7e3ab91def2ba9cbe328327bb1b8d7214d7a9e0. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/FR0P12100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a3f81a346c46a11978222969c85f38845021c7ba0b447cfe7eae3a66eaefb22. 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/FR0P12100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f81b1f6643b4f6580dcf95d902bd30a8e0c3e558827c353c0c47c9409dc7f1a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR0P12100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7d111b5f0949d7293bbf52c738e1cae2f4dbcb92a6bc7ee045a185a8c024f3. 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/FR0P12100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d07a92801eb0d85b040df876d6481b42c9f871c52d3afbb98e03a722286c80. 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/FR9W12367595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaefd85d0f872a2098f1fd8b25c031c39e21c2e36c9983282e07bfa060d0ebb. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR9W12367596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6111d33090e9be94ddc87afa5cd4ea45fa74e649dd8fa21b8810d06ffa4b11b. 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/FR9W12367598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2156c756489988eddbe3f05245a2393b7c9467894685d7d0ab86d3d9aedf2263. 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/FR9W12367599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6807622bbed06e9c478702b10aa76bff85bdb93c03cb14e609100d8d5981eb. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/FR9W12367601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61adaafc033c3c06e9d5b4ab8b8267858f2ceac82f712b396f6eff5d29e99996. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR9W12367602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567a20cd9e256c6ac8c7a318a59a02dc9f2cf0f44424e9c59e2701a6f2098b6e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR9W12367603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfdb8af7ca0c2704fd9856864278b18e49e1ea7892a10aac3fe812842135d5d5. 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/FR9W12367605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73a42005c70f0204b6427465fdbc12e43bbb5962fc3bfc2b084131c82a1d580. 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/FR9W12367607.
Anthologie des moments précieux des Suds à Arles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01cdf68a5d5a3ac92451d16919f88c372acc128a5052d9eb23fb7578fc1c47a8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRZ141028030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf589b3fb7d127826c5de15258b8635e96e30ac947af53bf7bc9decf0442a17. 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/FRZ141028080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86333947ba49342e9663a7b101719fccfd489a616f5714d98ec5e0262941e7aa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ141028090.