Payman ( , literally 'Promise') was a cultural and political magazine in Iran. It was one of the periodicals which was published and edited by Iranian religious reformist Ahmad Kasravi in the period 1
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 0x861160c156048d7dfe5df2f325e627ef44d4e6bad5d2defb7ac02a83e8c2df8d. 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/fb44c054-7ff6-401a-a521-878749bec97c.json and https://artists.proofprofile.net/proofs/artist/fb44c054-7ff6-401a-a521-878749bec97c.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 0x8bff39899e5ec3bb54baf103c2a07d53880c7a84efa8b2b36439d3970b5cdc39. 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/CH7812400512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb9f9d833cf4e1729bca56cbebca851848cc132a972b630e507e7b445ac3f40. 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/DECE72301429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b51dd21cc08dd154a3a4156a679804fea7e75f04fa5a5e1c10ff7da21dde69e. 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/DECE72202365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x216f1110e01c1196eb87042650d2e9de344d8b56c132acf730c2cfda2285c1b8. 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/DECE72202152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b1d58ba154f5b8951eb3e7afa465cdb17268819e828f2d25ecebbf6bb73384. 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/DECE72200886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x911bc05b2db4642bd2592b31ed95f50d54efe808105e04c1400411688bed1caa. 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/DECE72106301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4198cfa3b55f3b3aa6feb3786025a41b2b23a9b353438382f578743be0e919ce. 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/DECE72105106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612752b898b15b68dc7f78e8a88a5417fd94e5791ffa9fb70e1e329f9408e13f. 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/DECE72104087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68bb17c583562cf511d42d2da1d90c24f0392526d674504dfb39398f95d44027. 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/DECE72103860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f667aa1806a809a7d9fb57468f399f1b86c8568fcdd5b0711147e50fde7b052. 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/DECE72103452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f3c8687973207e8296b3171a6f8e91bcab68a93a3d5e9aa437e48cd5dd02d9. 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/DECE72100982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae32df9abd3fcc9f2e1ee028c86dd8d039f40d6bd275c6df3e992cad82683ea. 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/CH7812074456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a4131b54799df2207f5484e947c2afab4daa576e1d67850ce88d7a219b3b4a. 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/FRX762016424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551c44403e968253f3ea07dbad09b3e28b7718da59ea3e0fd525509ca82603fc. 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/FRX202040807.