Zakaria Ben Naji (Arabic: زكرياء بن الناجي, born 15 March 1993), better known by his stage name Lbenj, is a Moroccan singer and rapper from Casablanca. Biography He took his first steps in rap, wri
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c8dd7086a001098b73b1468cf8717654ad38a08b99a4e5fbacde3377ebfd96. 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/25b034f6-7979-48bc-bf27-5e7a101e6f0c.json and https://artists.proofprofile.net/proofs/artist/25b034f6-7979-48bc-bf27-5e7a101e6f0c.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c245e814324fbaa564e60e397832af022d635dae1e4543e5b251e6ccd524a8a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCADH1721821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658695dfff8de52fd6ae3852f257fff76d69c9b4e7871bb8a23723dd8ea9ab6d. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:26:54Z), 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/TCADP1890339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674f5ea3a63ff557edbbd8e6559fc6ca7ebcd6b1619030f6036522d4b5233941. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAEB1922162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164af540fcd2302db5665bde74b902d5d57d67364a3aa0b5677ccbe7e0c88c66. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/TCAEJ1970594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678cdc4da549b8b2b003c64aed4574a8195c9123024792adc603429b154366cc. 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/TCADQ1831046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02911b10e71e3750f9a6e17abc824479fcb2b500ddb2411acd276ad7dbd0fc7e. 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/FRX281920783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc479558547857413c363af893eb718ff429beb13dd1b51b8ed9e853f1af6125b. 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/FR96X2099897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54a1623d817c574cbdcd98ba37c508bf80d1107a4a3cf8fec661d96daa36b93. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/FRX202061108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b42bd3684384490c4362315acc7948af3fec2501611109c13ce35f2e5dba4be. 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/FRX762105494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a468807acc1b80d4ecb2bfdc4f04ae18cdb307ad169be88cbfe7d598ca954ed. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE5XG2501799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7722ce6cc985509f8248f4c6a0df0b9ad6431b292b4cdafbe764c147a1e979. 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/ITPDE1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7722ce6cc985509f8248f4c6a0df0b9ad6431b292b4cdafbe764c147a1e979. 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/ITPDE1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94342514df3aa3b7cbb028f0eb183353827ed2da5ccafd87c67df02a35cdeb8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR8GV2426210.
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