Tawaz () is a town and commune in the central Adrar Region of Mauritania. Category:Communes of Mauritania
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 0x770d9d490e174cc37c972bafb783389342eb567451a42464afad0ed1ca471994. 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/1b911466-c0de-42b9-bd2a-cf64ea24b91f.json and https://artists.proofprofile.net/proofs/artist/1b911466-c0de-42b9-bd2a-cf64ea24b91f.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 0xdaa032d1b470ccb2f1696fe7dadc8dfbbdafa230c7dc342ce5e9fbba704122bb. 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/NZPB12303479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803f0e63423bbae16fabde22493d35c590501f830d0de3919ce307556bf88109. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/NZPB12403380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce08ab4afab8ae63cc139ca084324872eb54769f3947d282a2066a0795d8875. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NZPB12403381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9ecb3e9ea44b372c4a5fb678cc1fbdf61e1d60b14a82f2bd48b9e29ea40e41. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NZPB12403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c85247a771cfe28b6f0467f55b9d043885c0189b6a41485a9a5961a8cfc525b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NZPB12403382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9ecb3e9ea44b372c4a5fb678cc1fbdf61e1d60b14a82f2bd48b9e29ea40e41. 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/NZPB12403379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa232ca12dfea5a5d4367471731c103194ed120fc41bae0b8b5cad508faec34c9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZFV12301153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237086930d9d22ec294ecfc2cbabe5a8f56a19fe54b0b4561fcd08ace4ad5907. 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/QM4TW2565817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68928fd160ced830825e7d13b1222fe3e4fd5a5e5c26f0b819d14c3f881b73e9. 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/QM4TW2565816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a7006209760d6adabe3b5898591120f8041b6130cb4f65afc7aad3505988a8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2565818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76092fa849c10fd163dfac618d3e4ada0dd654780ce397a1e774de0e8d4fe670. 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/NZPB12401398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79093f2776a890cdb27446bd28d8137d92706dc3667adf79653f404f7e0d7b1. 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/NZPB12401200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e0a9db172eeae6aae00e07901814a81fe207cf0958444b0b39a88cb65b02a88. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NZFV12301165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c2bd7bf7e63dee02aceb9d31e50d798ebbe01bbe0c89c7836230be13cacc4eb. 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/NZFV12301148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb788405aeb091fa4e23255d73627d6651a3a75caa958c3216e2a1562551e5781. 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/NZFV12301141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7532b4efc6cbfaad16e07297032f4732f1be219bcc7d6ea0d38dde5adfc1b90. 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/NZRI12401421.