Link3 Technologies Ltd also known as Link3, is an IT and internet company based in Dhaka, Bangladesh. History Link3 Technologies Ltd was founded in 2000 by Sheikh Raihan Ahmed & Sajjid Haider Pasha
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 0xd24a120fab783b3e71cb6183f925b6eb6a8f0e370aefe4fcaa63612013e29ac5. 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/2f53defa-f2da-4cfc-915c-fd71c6083c84.json and https://artists.proofprofile.net/proofs/artist/2f53defa-f2da-4cfc-915c-fd71c6083c84.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 0xa63491107ebc52784b9fe4081742d91f99f482e2550dd0f241bce66ff9674de9. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZPLS2290520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56786710ba920f13d6270964ecc2b0dab255fb4a3b256939dd28d1c05f9085f6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZPLS2290522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9ed9ea9856f0fce740a2d4db0f1419b9d411563c508eaa527fedb93e466b547. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZPLS2290523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fa59586e111793bb8252aa9a4702e0628bc0dfa491790e1798a898b760cb10. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZPLS2290525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c18c0f42774ed5894e302fe49008cee1d620198e656d523e55a1f4ba227d1c. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZPLS2290526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5550fc8167047935a98497afb0a07e9a57e0aadc717c13bc16d1001c6faf256b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZFZ62379856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c31083fdd17441e68fd30df8074b590aa56a4b2d65b2e5bb2fb97ef646deaad. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ62379861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0776e280ca53daf225b4611c02825f95af363635ea9848c3ec889e59ce1a3cf. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/QZFZ62379862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f42a2b9f2c7cde287d2832d4433a0f74a585733abceb4f91fbeb7d612862b93. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZTAX2379823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75edf5fc67d4f21da30efc697966c026549892bd239aac728f06b61eb90bab9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QM6MZ2415547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6441b1c3e4bbf39908c33126746e9e48939037cc425fac0e3c0dbd1f21818b03. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QM6N22425496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77bae0201e940a9f452ad285437bd0f9d884630b2eb45f961dee6506a7e7269. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZZ7P2403121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4843ebecb8743a825d376ddd51583e2a796f552f74489b7b7af0ac99f508a16. 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/QT3EX2457065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02e9a4cf1585ee1d44eee86e1f8d1ea48adb715d01e3d8040fb283e9fb1978c. 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/QT3EX2457066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef8f3f496eee7771238720d90caaef31e03d5ae493fb082983312c440423cc84. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT3EX2457068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2f63ab6d661547227da454cffd094bd10dc7f52e9c4eb0c72924c8da69e29a. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT3EX2457069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898d9e5ae3aa0cbad081bbb64f0e70b28d84c70843c2f572b6989860d4854414. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QT3EX2457070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1841d3155284d6afb3236ad59cfb77cb947b70e6bc8e22b57eb689c8a51446bf. 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/QT3EX2457071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221bdbe506ae8b1c0a8461ab5b91a477dcb4b9c528f5fa5834274b63db67d9eb. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QT3EX2457072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4af629ccdd0948bdc00da21330fb53fd29fae8c5059a55484e0ad6cb086a2ac. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QT3EX2457073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc5209c2b1b3aaac9170180102890eaa510e85e97fe14e55c776207ba12bf1c. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZWFP2562358.