Aurthohin (Bangla: ) is a Bangladeshi rock band formed in Dhaka in 1998 by Saidus Sumon (vocals and bass guitar), Tonmoy Rahman (lead guitar), Ponir (rhythm guitar), and Rumi Rahman (drums and percuss
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 0x3102fa8c90f01cbfd478f2a12f2bba500f67abbc72a60a20c7619e57041ed2ee. 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/f61a7095-bdf0-484c-bf61-d129e8ab77b5.json and https://artists.proofprofile.net/proofs/artist/f61a7095-bdf0-484c-bf61-d129e8ab77b5.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 0x648a50866501ad78a948b39b7104dc0ebd8160b68161ece1ec251382ce8c51c9. 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/FR10S2348674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06aefe0d5f6f681135edf94191f4313bcf5aded8830b6236b2049f1284d74cbc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMLNB1300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a9bd37fdf98fdc6566e5671073d5b15e18cad1b2f7b60404556edd27532a0b. 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/QMLNB1300421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42ec80e2e0d2a08434026de0554c714d4396005d216103b7a394717e1f520be. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:59:54Z), 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/QMLNB1300428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fc905b60a9cdb678b196ddc8ff5e8a7182f9802f00c7793dd1512b873649cd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMLNB1300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0906697c9e24939d2b510e22895e4406ea47c82ce030ef35517bd7a2293ec6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QMLNB1300444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c85424dedf5607fb1f91fdb716e9c1c58dff329327d3e42b5973a626f9d87aa. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR10S2348630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c0af8ac54eafec72d818341293db1b765795d732453a0c273972f3d4e4494a. 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/FR10S2348631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e93549a4b4e33ca2708937c3b86ecd4d0cbaf243c3a57ce851add2a0bbfbc0. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR10S2348634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdcbce536bbfce654665dfc331cd342f91551271ac0f37147473a328b78ffbae. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR10S2348635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19ca22f0e0cdafe157b6bf80ac3427d0a8d97076ac78efe732e51d371ce45a2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMLNB1300463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17b7d8457195924a2bb30b340617cf6b2d19b1505f7f086cf0b920f38dda4ec. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:58:29Z), 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/QMLNB1300464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1d388d14e296be91f2942f8e96399146624f1707b5047a5b6d3c7d15db23ca. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QMLNB1300471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0874556e5c8c246a2a81e03c9b30ed02f0223b2201d30260d09375ea100d49ac. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:33:58Z), 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/QMLNB1300472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c241345fdb1da7638f07377770508714d97cc42049fe6d14dfe4f0dcc3835ef. 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/QMLNB1300473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4491b7b8d5cfeecc5748e48d8499c148b3d1aee71649852e8ce5c54310b60d56. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:26:58Z), 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/QMLNB2100215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb128352c65d51b2b86a2770a9a55f8f5d79cb5cdedad3bb0c2199f2f2e6814a6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QMLNB1600464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1b9ba57372eb4b641628be3a4ee6edb9b2f27fcc6352aa83d7c9acd86d88d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMLNB1600465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184e29ebf103602f4f0b68446a359fae151136e94aa1ad04949b4a3523b5ef24. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QMLNB1600467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc641fb97d8c7ac71f888d03babdc68ede5d2e32bf5ff00238f8c7b7115436251. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QMLNB1600468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0509c52d0c2e7814d55fbc2fee9661e62f1a3ac3e86072272c622da53f29c715. 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/QMLNB1600469.
Karon Tumi Omanush (Nikkrishto Revisited)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc017fcac123d53a122ed5f8851416876485d94d608777526937e4fa7f4b8184c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:26:26Z), 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/TCAGR2289546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7875def29f1a7430ea77b5074fe8df4ef50b0fe69884a79834b8a43edde4393. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:08:23Z), 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/TCAGR2289574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bb1c47218ee532d94d5721d0e7832c791a2b69e6001feb25361747caceb64a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAGR2289584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f47dd1b6e36c1d54a8801a05dcbc7a59228735a2067be5a96f3e413b759d138. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCAGR2289645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c375ccd46aff389ae05beb80b00bc09e16afba1883ad41ed0b267ef112a43c. 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/DGA052353692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98d7cabe73005e4dffae8221d243d9c143db1bb23936f0ea35af6dc0f14766f. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/DGA052353878.
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 0xfa52232736547c5d7ca83349a8a18c5ee295fdeead76ed00dd27f32a8d9e39bf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DGA052370105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ec14fb1c64523ffffb249bf0f82320471cfb827b01ca6ce1989365f4b9bc58. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DGA052353810.