SULFA, short for Surrendered ULFA, refers to former members of the United Liberation Front of Assam that have surrendered to the Indian government. Since 1990, the government of India has been attemp
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a75344e11abee95544cbbb8d5ed582773ef51116785d314c6ecf50399f5269. 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/71109dce-84df-47f1-83c6-eb69a9894c99.json and https://artists.proofprofile.net/proofs/artist/71109dce-84df-47f1-83c6-eb69a9894c99.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a0d02ab4ce9d937054374c910d50a5bd17aeab95d47cd5a9eca08d13d33dfe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202276925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe19c14876921e9ba0dda5dccec5fc889ac72d946d9d489d691308dfe6ebd4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202276924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b346bb200e68cf2b949a9d9353afc482bb81347002d5bf10a7e3929c2deb089. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FRX202276926.
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 0x766378caa35579a98bdee094adbe081e75357829e9cc92008d9858e4e648b9fa. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRX202272894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd22304ed8f26b3fb37093a6949590aea5be9c73cfc246738e1d9e771ece8f53. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRX282274731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b3822152a187e787451ce561c53c115a1be99caa3191fa02cc48c281384c4d. 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/FRX282493116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd22d083e1bd9cf21dec95b75130670d2d9b1f4f3e5b6d0c35450f03a9af840. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX282416741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b42fee5e52516d91a08cf80901c3118ea942bafe20c5e2d8840bbd3f3bf9a80. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/INJ221905520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc27f41566cbc38fd07c0bc113d6ad7fe98893bfde4a2b245dee065aeae4eb2. 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/FR10S2497981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe071898cafa22be839edac23468fad0cda589a7c1ada30f5b423b04f0bd92303. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR10S2441579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301befb8e7459ff38789a739e70bf9f203ddab8bfed014696f4a22eb8ecdd80e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0R2318688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa4107f6bb3faebbd998bf137bc50daa0f989e1a92126ec3f54be59879dd368c. 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/DGA0R2307135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712d53815eb70a05fa340737d7db1cc964374da25181a8e111d1186354811330. 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/DGA0P2390594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25c35072c4355d936bb7b0d4d5cdecc7d761d694c0315e0225e106170ade197. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0P2335574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757f7d1d807fe129145daaa012669bd71557f31026ff5883aa64d78c31791232. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0P2330545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52004e2b501a8d22c35842ee2cc97a7aa6ccafe7243251a06897cf0210e405a4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DGA0L2342617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d7e14fdb578ec5365363c880608e010dc198be6df4166b2f1444b8b947427a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0H2372608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b7794f75b58fa9c09614bb774d1a454eca53f29d07445f3e5941c2eae0a842. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DGA0L2313150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc336e8248671f5439cc0eab16ae99c24ab33877e7b232f64f04d6a07005dfef6. 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/DGA0M2374146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ba183c88ba9ce677c577986e4e0515264fd1d0e2bd15ecd511bdc3625fa84. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DGA0M2399122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7233046799bdc9dda475cb0bcc3a240917e31378ae02373c2c358a0f3ed7d9ed. 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/DGA082390289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c39e8db5dba630e683d64fe366a0046389b3cb6758e05646b7e84c8e186550d. 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/DGA082390293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf49aadfdd76a04dd1b765fd3451f7130e90162a03877e1d45db1316b529bd4. 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/DGA052315943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccf337f7b3d147e74d29b3a1874915f7fc3054f6bff368f1f5d234846b3a6c0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX872303483.