Bab L' Bluz (Arabic: باب لبلوز) is a Moroccan-French rock band that was formed in Marrakesh in 2018. The band consists of lead vocalist/ electric awisha (a smaller version of a gimbri) Yousra Mansour,
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 0x0dcdcf0dedb48926bec68db8d3f7fd4af64dcab7722c17f69e43f59eedba21e2. 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/a53b26c2-4ac2-44c6-884c-ffaf591fb1fb.json and https://artists.proofprofile.net/proofs/artist/a53b26c2-4ac2-44c6-884c-ffaf591fb1fb.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 0x8984a0ec7a94611fde68a7608ad9160c3ed6ad20f698030b60d79678489f520a. 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/GBCPA2001487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45ace3b7da1cfbeb9adb1493afb074cde364e7d6468306caa05caf63addcabc. 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/GBCPA2001489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095fdc4df777106cc9394df8f5a54b57ab17c81832334d5ae8a6013a7e30a97f. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GBCPA2001490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9aa4e07c63b85af6be62d0b73cb90b60ed3e790b68684de545d9bd58a938210. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GBCPA2001491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e7b5ac52ecf769e11bfcbe3c0ace60945858a6b3a3c6e8bb73ddbedb1e2ab6. 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/GBCPA2001492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc1cca0135c4611aa2a2c009739b3d8e5aa340b221fb121e7efbe2c9cdcf6da. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBCPA2001493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e56237e0d4027e6816b45ed26954bf445c98bcb0c8e41fdebfa866418f91189. Chain 2 (Bitcoin): anchored in block 958863 (2026-07-20T10:27:46Z), 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/GBCPA2001495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b756ae26662190260b5fb95f00327d83cfa06cf3c33064f7e5278d12b579a25. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBCPA2301966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30db5d1547947724ef9688af091d5f865e4309b0efa0593778cad71d940c6ca3. 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/GBCPA2301967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb3d500ef2c32216ac9a93d90719658966a32fa01d3a5036e75c98f4498c412. 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/GBCPA2301969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe473db8e51c3002928d60cb29c8d305d23d4aa4c2449dce1bb62fb874e31a793. 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/GBCPA2301970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826c431d1c956b7a44c0b7d0dbc122baf9a343e2163d30051f1e910448dc9608. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/GBCPA2301971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bffa5d95c281779742b9b751e130a3e9fad84cd50323994798613cadd465026. 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/GBCPA2301972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836b218a8fc139b48bfc3144a95909a0b938cc219143f8cc95b7c0d75ebbc0da. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBCPA2301973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540e86fc935627692f161c52e9ce0c382d0194226a6db9a73f50a04175dd2b18. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/GBCPA2301974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb607ea34f39bb229cc5138bfe68cc875670c6debe970768d062193b8d12d3b4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRD9M2101220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0d9c5d38e828cab231339a5bd7b9dd8884ee580dd05fc13e5f21d69335d5b0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/FRD9M2101200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91f96214d49cbfbb176477f2cf78855d757a5589834b040740c0d059e8a0e267. 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/FRD9M2100990.