Élie Thitia Yaffa (; born 9 December 1976), better known under his stage name Booba, is a French rapper. After a brief stint as a break dancer in the early 1990s, Booba partnered with his friend Ali
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 0x319f2588f374e9360302cdaced860bd50dee2523d1773b1ce18d6cc6fd11a480. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4425e9ad-8880-443a-8363-18d797baf062.json and https://artists.proofprofile.net/proofs/artist/4425e9ad-8880-443a-8363-18d797baf062.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 0x432254c2b236f20abce49d53e3215c991d81ee71fab2057c1726b73070727c63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFME2411846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b6b7c494f1baf8cc4d552c0492ad72991de71fdacb75e1f8ad461d82beb1b62. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR8R61400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4ef36c8a8eb726f7a868601aeb86af2af5fa0c11c766e40f76d83b5218574a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W11516222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0b6eb3e3eb2247dffef565c24b6e47ef8c83ca378598dfbea46f09bbb39ad8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR8GV1810090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4838dde3b41c0776dfb269b7fb73f5e58dcf9a58c836b46a19fbc62e644a72. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRUM72001416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275507431779f1a8df27f2b9fc1186d1e512d46d727538c6faf30251066cb81f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRUM72102322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4838dde3b41c0776dfb269b7fb73f5e58dcf9a58c836b46a19fbc62e644a72. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRUM72001416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2563224e9ec51901b3ad7ca027b1bde74f7877204ca2068efc604fa2d5199f1a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRZ042000764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5301780909c95b2ba6470705908d07224a01711a2e579f0f1bd26b34c6797284. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR8R62400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddd156efcf8657382a535cab55c4daf2488eb3ec5374a0164d788b4e96ead9d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR8R62100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a416b5032e045cacf9424b5b1f9ca24ce79f13059b657b3def615dbbfc260ba. 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/FR8R62200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942f4bcfe6a8c8e6dff05eae952a3c0d0fee56d16a783b10e334f9df80645d97. 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/FRUM72300651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256157cb46e255917f2784e44a13e3db3367aa72d5dd1d83585f0b5166cd1730. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR9W12217163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256157cb46e255917f2784e44a13e3db3367aa72d5dd1d83585f0b5166cd1730. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR9W12217163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3159262c3b41b08360378a4d8244cfa0ad0e451b1da951ce6172daddd3bc68d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR8R60480110.