Tarwa N-Tiniri () are a five-piece desert blues band from Ouarzazate in Morocco. The all-Berber band was formed in 2012. They have released the albums Azizdeg (2019) and Akal (2024). They have toured
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 0xa1ff5071100d605d76c7f9f00b3e8e50236a4af14d6f96bc6f52997c5cc31542. 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/aa0b39f6-3f29-4976-b0ae-26dd7ca2326d.json and https://artists.proofprofile.net/proofs/artist/aa0b39f6-3f29-4976-b0ae-26dd7ca2326d.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 0xb8286020b3e693bd159103f185c8f049b603a63eca45267e59e32ff59310416c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CAY941900033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e55aae7301c7e73f452b6162bfae1bda45527a5abc833a01f40856b509cce6. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USL4Q2147307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5089d52a97f3b2dc7300386026014f0ce4c655df015dc1bd18b6b9cf9d73b990. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:26:05Z), 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/CAY942300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ae23fee6df1999e5716d38fe861637eaa6f62615babcade4b1791e9b64963d. Chain 2 (Bitcoin): anchored in block 958579 (2026-07-18T16:26:17Z), 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/CAY942300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8031310a483467b14d4ec95d3bdd10e2d8ee234e0ceb9a36b53d200b309689. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/CAY942300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0fa06de6cb75595a1de9db2d2895ae4b6f8b0aa1e87241bafe0ec63c7115e9. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/CAY942300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25f6802fc40c22adad44796b890fc9689359245ca421468114c10d9026ad94a. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CAY942300047.