Ahmad Amin (Arabic: أحمد أمين), (1954-1886) was an Egyptian historian and writer. He wrote a series of books on the history of Islamic civilization (1928–1953), a famous autobiography (My Life, 1950),
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 0xdd8f34df5bcbb2fa779b4df90d0e51be470cff90b31c95f412a7d3924f1cf16d. 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/8c657421-7491-4ff5-91bc-7271f90999ea.json and https://artists.proofprofile.net/proofs/artist/8c657421-7491-4ff5-91bc-7271f90999ea.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 0x4b1d3485067795ba487ed2c029f6ebf48c745ce16ed6812aff09a431d77e4d58. 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/DEYA12000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320a55d93c12e23f29f15313dc9fa23129f693733617ecb1269cad5d903d6253. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/DEKF22100883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb900fe412f06842f53f464d0accd6442c45f8b718d471b419df70ee4c37611d4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DEKF22101265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe634575535e8457b5fa4cc935c22141a33f5ee0e10c81dd1179dad0333f5028f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEXU52200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5666cdd4641960c452b6e908bd4ac4ae1d35cd1bce6ead2d82b8aeade52a5343. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DEXU52200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b438a4f2a39904d408e3c5312a84f483a8c33661a7aa5def45371d97489e063. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEXU52200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c8b37dcb7708b7a0635601c79c5c2d4eb5618f3b972c84bc35649b765a0db6. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DEXU52200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76590c167e1b5728e49f654af3d3f59f5cd64c409946a457e2f76facb0559e3d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DEXU52200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb900fe412f06842f53f464d0accd6442c45f8b718d471b419df70ee4c37611d4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEKF22101265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667f3d0e817f173c928bfff9cda023f2368bd544cb8cac75a52e17f1d6f2dac3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEXU52200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046c20617a8eea6e11175c8aaf4aa1768de26f8b0d2cd84503b59468c14c3975. 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/DECE72402087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046c20617a8eea6e11175c8aaf4aa1768de26f8b0d2cd84503b59468c14c3975. 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/DECE72402087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba99cf7cffda83b5c8f266cb848e6899ff3409834e73f2255da327206c34897. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DECE72402660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372b03256690fc354614be5bd8da54f3562c2c0e77c8c33bd9e1b8850692cb9c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DECE72402672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85c088793c65ac0b731bef50abf54538c2e5086e5d18acf47bb349d9556479d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/DECE72402670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61119bae312e724e6515f1185f5baa4e839ae41d19ac587ff2cd3e393d871cc2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DECE72402679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6684953c3940b9ed296d9a148ac85b19944c991c09067e206e7ac7b4be5ef. 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/DEQ022117692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b7a5b7593f5386d01396bbe044ea6af0651ff664fa128773334ed90173f746. 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/DEKF22200980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae916bc0380c1d423a7275011dab24d9604587e4e37926aed2387c29e0059d6. 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/DEQ022390968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f620d54881d99796f12611c0b0582586bf35d3af167d74dd4db85305a2ac6b. 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/DEUM72410502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff2c0eb710110287f82278bd413a673e7c38d2a13fe6070eb36863a6d870e7. 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/DGA092346716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ff2c0eb710110287f82278bd413a673e7c38d2a13fe6070eb36863a6d870e7. 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/DGA092346716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d80c1ad9ab9e8b7af0336a1d96f35ae2ee818c2743ea0fd32177398aad8426. 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/DEXG92100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d80c1ad9ab9e8b7af0336a1d96f35ae2ee818c2743ea0fd32177398aad8426. 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/DEXG92100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d80c1ad9ab9e8b7af0336a1d96f35ae2ee818c2743ea0fd32177398aad8426. 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/DEXG92100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328029e0e04d96adb856e9a21cc2af9bb32296942b877b82cf7aa5055a2c18d7. 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/DEQ022372200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c6684953c3940b9ed296d9a148ac85b19944c991c09067e206e7ac7b4be5ef. 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/DEQ022117692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba99cf7cffda83b5c8f266cb848e6899ff3409834e73f2255da327206c34897. 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/DECE72402660.