Mimoun El Oujdi () was a Moroccan singer of the Raï genre of music. Like other Maghrebi raï singers, he is habitually given the title "Cheb" (), meaning "young", and is usually known as Cheb Mimoun El
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 0x59ae98c4753fb980cd91d95ed3ee5e07d83cb6ee15ef68798557dc3bdd2050fe. 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/a31a23ea-a29d-4ffe-8692-706f345684fb.json and https://artists.proofprofile.net/proofs/artist/a31a23ea-a29d-4ffe-8692-706f345684fb.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 0x20ad12a9209ded508e168450ece57248904d1dbe53fc151c9e88148ff3c2df1e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/NLEM80820018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb07fa2e084497de0b91ad62a6b47b82d546f88822458cb48f3d5fb9b1126c7f3. 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/NLEM80820020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e4e5a22239c701e332b9a4bb33f8c9ee71987d79cfbbc732b397a510bb5700. 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/QMFME2355784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe556f3b6b37eece009d72d583189663dc8ef290192ac99c2d72f3540042c6613. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QMFME2355785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59c0d988590997aa444983b1b004c4f43abc372574f4940493afc68b0c8fc1e. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QMFME2355787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1491a361194b0dadaf3406b6a154e78590c7a9a32aa470e0d9c14abffb06ed2d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMFME2355788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5def1b05b85a969ec086b8ffa9c909db095e8c1a8ba876d19f3c38b365627a92. 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/FR43D1501481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843d85b3669f057141d2ceb098c1df8627bb8cfb7e5342e4128f51b4ab5a3baa. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR43D1501482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9db7c422f9b9c46e38ed3cf0d0ca53ba596da98b434a557285e67048bcb71319. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/FR6V82362597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x909ac9f22b9ff43b484cffe5c51a4aabdb3a288a80d4ce878523e60569218ab2. 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/FR6V82362598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x966a31965b560919e7ef784f17a3c1b01bfbdbd37f5b76329f19b54c00c2152f. 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/FR6V81457614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3d0217afb5b9b1d8c77848b3bbe237165792d6850f7fa04bdb1ccf382449db. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:51Z), 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/FR6V81457615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6470acdfbbcf96aa3bfdcd281946e69ffd995d66eb32aa208e09836c2d2d9aa8. 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/FR43D1500782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b7cd0590ab7e8217b8e7eb00c7d14c4469fe3c4055ea698af61255e43f8fbc. 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/FR43D1500784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdbec99ccf450cdfd7c7e256afb4d1b349616d2a6c6311112e67afe7fdac46ea. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/FR43D1500786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a91c6983d630a844f53bb759cca1dd02975ef57ec783e814fd790fad205ff7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMDA62263148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbffb490b34dc2acc85c9d054980f9980a47d2bb5c665075596c849f9f910f7a8. 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/QMDA62263482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bafd81d731fd0282f5ac3fd29f48b510d614f60e785f78d7011e84262f7b868. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMDA62263486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e02d5c2d356920d270e9111d602dd87c6301d23fd30aecf30f8ce23f3831f5d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR2X41628381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbfec28e1f9d78bf2851cd3da2060e33dbb0c8e1266c8f031f7e3b307631138. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/FR6V82362596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb2617e3ef44e8c98bb907efdd5327d207844a4c94f1b58109d8483a0a63b6a. 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/QM4TW1923482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf371b11d8e58a659089bfb55ddf3fd054b92292c0493cf7a29f3c1e17c846976. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/QM4TW1923475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e95991a43c14a534e8c8dc659262022eb3db0457dce31eaaaf36be058694f73. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/QM4TW1923476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f21f82af69d89e50f2136c61fb57c77d082b2b5da5bc4e9768d561f0cc6feeb. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QM4TW1923481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd57dbc4e8827be37b25cd51c658c30e0fdc19d884c3b547f284403c668d083. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QM4TW1923483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b37e3361ec752feccfd61b4e1047ec5e254bf620929f5594be6fe0ebc9647ba. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:40:52Z), 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/QM4TW1945294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b0fe2e60bb684ec439d9443dca0b7f20675d6af506e209981107ecce594f1c. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/UKR6V2013229.