Karim Ziad (born 1966) is an Algerian musician. A percussionist, drummer, singer and composer, he has been influenced both by other North African musicians and by jazz. Ziad was involved in a hard roc
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 0x075298f9d48d582f783a5f09b17a0056f0f26f90906b1a46d40c04bf1b1ccdc1. 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/71517e7f-5cc1-4c7c-b10f-109e24b3177d.json and https://artists.proofprofile.net/proofs/artist/71517e7f-5cc1-4c7c-b10f-109e24b3177d.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 0x17f23e6fa7a081c78adbff122dc8a861813e3d56b48cea7e0d6f1af445ed8b6c. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEA890000960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e82cd65beaa51dde8ba808832b350c4e3e8e38e2b1366f11d53903b663eb65b. 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/DEA890000970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb393d8a5bd4ca05dfca29d8b7b92809a882c7c0b76b86a6450a2d139420f88c. 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/DEA890000980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf870305531e31e711a428f7308b307816af660105c774bafe5078c7e335952c7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DEA890001020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e97388212df0b41a8e7d2517fa995839f184ae94d54fe54b38f543e6621d925. 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/DEA890001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9c2620df0a97cf856eeaa35ce407e520452e24b275f05e8cece23c40a9d6dd. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR7PB1700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fa75b9722a1bb7ce74dc6d962fb6f1cd6973323f907f35b7fe49711078bca7. 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/FRV961000045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9679db01eaa9b45130152ed19f30bc8098059b08f2c9706a83522e12a9dcde. 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/FRV961000047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202390fed3864cf2afaf74c5dc1d74b1efbf707f34bc101b683c0cffdb730ad3. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRV961000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffc807df2ce1f0d9749369afc9a70adb4bb053a9b176dfb01f1e800622edb6d1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FRV961000050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa08c9dfd7f7930e0739e0c56246b66691f0b216c22b367e212761a312d2e67. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:19:20Z), 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/FRV961000052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfe76ed821a1d41c44215853614449b39dce5c04bc3f15b95600aad5e8076d. 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/FRX282114395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aef3db7a17b32ea6537bfb6df7ae97c0e245463723bc81f60fa2fec1867fb6. 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/FRX282114396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c66d5876e6ce29f741f40240ccb6d9ad59eae454372a7146b9bb35c57d32ae9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX282114397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf94f0c2763f2e587530853fd7ef1a55e643d7972ade15595b6a6439ac68743b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX282114399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa395a6a38cd6342969630888b9a5a05154e42ce6aa52af03bc084c0d452b945. 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/FRX282114400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebda43c7f156378c4a03cb4dcb51fab1b36d019ecbcf28f73453dac36829a4e. 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/FRX282114401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17975bf0fe3067e4171153359933c975bb2168bca7e3a47b87cc68dcc6fbfcef. 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/FRZ131804010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4a9d44e67a78ae8305731dad6c66e20f82983a7a9fd70de255393a61dfae49. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX282114398.
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 0x9cce4eab946444b9c5bb350b02720ab7e77cf5ae780bff0db6a90a700fbb546b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FRX282114402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed2569e7b9f4b92b8cc3ad71d0fcdec11e7391ad2847cfcefa7415b73c4780a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRZ131804020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75186531ae970fffb18246dfa22e248098aeda6093be2e20069368da09f82a80. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRZ131804040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43615512e649aad62d3fb9df4dd09d59bb98febac42ddfcfc50e491ab8913f5a. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/FRZ131804050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf110ddb35e0cb41bc92165bf9fc854c4f82ee6d389319d3d6babdc63a56e087. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FRZ131804070.