Cairo is the capital and largest city of Egypt and the Cairo Governorate. It is home to more than 9.8 million people. It is also part of the largest urban agglomeration in Africa, the Arab world, and
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x6518afbf82e199df4ec30955823569b415f25d65f2289624bd99ad0c82c20698. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f14e50bd-6e1b-4867-9f38-6d8ec460bd80.json and https://artists.proofprofile.net/proofs/artist/f14e50bd-6e1b-4867-9f38-6d8ec460bd80.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 → block OTSBitcoinBlock must exist at that height 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 0x35b4e3f9d53e167a1d7f90cfc0dd092c74d82dbdfcde8db6a6fcc958de9f1fe5. 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/GBDLP2201224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838ad3a65bf09cad475de25e8bfce85494068dbc6da4d23f93c99b03e3b9b641. 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/GBDLP2201225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d21f919ee28372a2957c5a2f4c91586eaf6800b5da0eca27232c641164687cc. 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/GBDLP2201226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004b502eb19f818fb7048d175d0604a04ff78c401baf4bf42c1db0c3a2c529d1. 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/US78S0500401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6979581e2072d7fbc4b9eaae46478bc48fe6cdc2d6b19b9eae0bf97d8dca59. 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/US78S0500404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525d0a8ecd377655a43d2e06849f73e692e359f14a59acd35176ecd757504d06. 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/US78S0500409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206f007be21ae9203afbaf97eb7d803472511475b152ffd1fe6c4be816e0e4fc. 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/US78S0500411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ceb2d7d14563880cb14e31a0a2afca370ddf70638935c6e2c2e78ec641afe41. 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/US78S0500413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f65cfaa82b3ec468c31c1634ddac54db7cdb95637a2e4f677f9e7ba76ab4a7. 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/ZATM52000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26130e6309eee634b0c49ea1073adbbb24a3057f5dfa04510bb99d7fa4749103. 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/ZATM52000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2910b7ececda2ac476f3c001d77cd710485b0781100cec5660b600e909ec28f1. 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/ZATM52000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e182a6d3284ea03fa4babba0ffd7413e1465c71345da6a7960491a63c053f8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZATM52000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415d4771876fff2ccff8cbe47ac59c120cc390906e4da1c9de3bb8e3d4c7f5f2. 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/ZATM52000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cacd5fdc89290357651500579d5aee12c48efccd563f06a34c3783ea8677b18. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZATM52000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133428da34567047c5aff91ba7692305dfc465e8550531a67efb3c71d64adba0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ZATM52000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc313fb23f21ab18a41b48e1d686e9abe9c0bc734cd8d55a66359ad01534ec4. 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/ZATM52000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08a2f0b1e1b8232376c2a9c98ef6044b4821cafd46c106333ff5d1906ea5808. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZATM52000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02fdb8339a78d10ac9800e782ed682ac6fb982a1530f7574bf682f913969083. 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/ZATM52000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5fb8242257bd7df13ba741b0463d70132bfa4c4a3763fdd32263e23a121448. 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/ZATM52000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c760b50ed489851b98332c9f1955ea81b34aa5d67d5a889f1699779784f8b11. 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/ZATM52000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17ccdf57e8061794b5083e68ea657f11991bbd1380eadb76602b853e01a718f. 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/GBBPW0400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d608b82f2627c0dada0e22ba1503b7725cf809e2d56027b0b09a956fc14832. 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/GBBPW0400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d1c43258d46e06a4095b6a3afd7ae57517d6698633cfe7806c9371043d4da3b. 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/GBBPW0400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035ec8442f8d2979f823bf6a59c6f699420b335cc8977f11714d0b34c2572178. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/GB2T41700024.
Merely, Minutes in a Day (Section 2: Antique Mall)