Abdelkader Chaou (born November 10, 1941, in the Casbah of Algiers) is an Algerian musician who is well known in Algeria for his own style of chaabi music, both as a singer and a mondol virtuoso. He i
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 0x3e03effaa59666e0fe997c31b53d258959a493576e936a25df90c9eb1edf70fb. 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/8df37252-de7e-43ee-ba44-3ca64b78cbdf.json and https://artists.proofprofile.net/proofs/artist/8df37252-de7e-43ee-ba44-3ca64b78cbdf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'enfant de la casbah (Edition Remasterisée)
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 0x4ff93e138b29be7d544e862835c37010293a38a669a9d68ff5177acc83b5f9bf. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FR43D2101284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5da7a6478e3c07f506fce9c66a41f07446c80c9d8a08eb2ddd341cc37c5d10. 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/FR43D2101285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a97750c426e393f82a39752a36516d76089316c4bbdbe42e74e268f3bf785d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FR43D2101286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d4aff4c33ade036f4387cb7d3a178c89577461273ab51a94d6b137ef0c8676a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FR43D2101289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c89caa2f7e4681b39d5e979196f7a1f6f0b62668ed31c9b7108e2865981d602. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QM6MZ1491037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f6465e091d28cd280babd06251dd5d71dfe9fd2355cd55be6575f48c06ed8e. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QM7281576890.
Kahwa wa latay / Fi el hobi wassal - Enchainer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c8b70fe40ff1e6667c7270d9e94abb4569adbac8e9ab66d0e47b442b99c513. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFMF1516531.
Les légendes du chaâbi algérien, vol. 1 (Remasterisé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a16205adb7870174db4ede3eca0ec3f386af699ab66bc7337b38c67e9136f18. 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/FR26V1642226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab2210b39574b5f4b6e619a851ec3574558e8dcbdf44e4fc62eaec2c7cde11a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FR26V1642229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb84655908621d8525edbc10c6c43470b900b389f61db8b6e7a1a967b800379. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/FR26V1642232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2dcc2631aa5ce9d57434c7769f3b21c3f9d50ae49c2105e89fc683ee603556. 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/FR26V1642237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7a348474ff872de8c252d99dcb5782ab7480c622a30d11b36137d971158de9. 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/FR26V1642239.
Sobhane Elah Ya Ltif (Coke Studio Algérie)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc652d7e68fa3345bc99a5c01291af29a6d2df65b5a29ea969cf83cc14ef749e. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QMFMF2110848.