Waliur Rahman (26 December 1942 – 29 November 2023) was a Bangladeshi diplomat serving as an ambassador of Bangladesh to Italy during 1986–1993. He was a Jatiya Sangsad member representing Rangpur-20
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 0x97b5707584df8253b76b007ce474cd7039eb6ab26893d7a59a19d4969e94a736. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cf4b6499-b3fe-4641-9ba7-139bf9850462.json and https://artists.proofprofile.net/proofs/artist/cf4b6499-b3fe-4641-9ba7-139bf9850462.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nazrulgeeti (Naat, Hamd, Ghazal, Qawali & Kaumi geet)
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 0xe9ae03075865f7a173ed4d03ae63a62ef8c1995c540282c5c126bd0e552fe248. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBSMU7096993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1404756f0be56f66fcd4920ba89e5bb6be4eaf92aa6996cf4b2bb18f8e89e9a7. 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/GBSMU7096994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268b1200cbfd2cdf4a06278ed01a2d99cb5c81cea6b24b10b96d628fa19fdfd3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/GBSMU7096999.
Folk Songs of Bengal (Tune of Soil) Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3165fb5ec93d4b943b057b433fad233af9825b6c7a6645c5c009991e8409e8. 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/GBSMU6477463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb290e32c8bd5d26dc0f09eaf48a7ad260a01e9810ad1527b6a376b6767e39f. 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/GBSMU5870336.