Ferdous () is a Bangladeshi name that may refer to Ferdous Ahmed, Bangladeshi film actor Ferdous Ahmed Qurishi, Bangladeshi politician Ferdous Ara, Bangladeshi singer Ferdous Wahid, Bangladeshi pop
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 0x8a10bbc17e7108a465c81ed843b4f27c16543ee40c9e514f7776052b7a79dfa1. 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/64eb6189-1dfc-4b75-abaa-7945682f81b5.json and https://artists.proofprofile.net/proofs/artist/64eb6189-1dfc-4b75-abaa-7945682f81b5.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 0x94f3d568f8778f4c038cd35c25cba47ac1183dd356a7ec8c477d82e3728d5c15. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFYW2019029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbecb3af433e1a71b6026708f8d9a5eb4f1bb580e795d9bbaa324067b9a2f9f9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL3BE2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe70393d18ef686b8a065a5ac322666fed248274f712f8eac3c875937fe3b5eb1. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/NL3BE2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f29d0b285801226963b1fb08d69d48593878ae33e56ab5e5d84131e81651d9e. 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/QZFYW2019028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333a7155e401152ce651e3911a9734e7bd57b3261782052690aabe991c10da04. 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/QZFZ72048329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e02870bfeea71cdbb519414ef14626fec479a60f70cf8f1ca6273c5865d0fe6. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/NL3BE2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477a1f31314667a293e232d6c512b357b238a4a5552f66a75404bf2edff19fbb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/NL3BE2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d9fafac869c556712d6b4bf179e53a8ace1aec650aa707033c8fec09d68ecd. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/NL3BE2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e02870bfeea71cdbb519414ef14626fec479a60f70cf8f1ca6273c5865d0fe6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NL3BE2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943bab300844ae9f787e2afa660829fcf553644c89f468b9752cd703beaa1419. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NL3BE2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bc00f0e6c5187295149b9cba26dd9d811054b6e4b5910db0a032df05d65bb9. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NL3BE2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb475d5f8d6a62fdd5b9b2e2a991948200664539ee759ba423961c9efa97fa8. 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/NL3BE2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fec640aa8fac5d59d3586744dd351d1f7af46f269f28dbb7164259b03640b2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NL3BE2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c0f6a5b66b13e422420191603fb15af287f662a0c581870af9d7cbc4f49061. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/NL3BE2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bc00f0e6c5187295149b9cba26dd9d811054b6e4b5910db0a032df05d65bb9. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/NL3BE2300011.