Nan Quan Mama () is a Taiwanese music group. The name is a phrase in Mandarin to explain having strength while being gentle as a mother. They are closely tied with the well-known artist Jay Chou, but
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 0xa9be6a69c2acf057b5c3051bd7e15c49df160dab54e6faa5975310b2327f9bf6. 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/876addfb-a5d9-447d-8bbc-db24470e7457.json and https://artists.proofprofile.net/proofs/artist/876addfb-a5d9-447d-8bbc-db24470e7457.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 0xca8dd691f3ae4cdda90de80e7da60f5fda53d77038a7eb8aaf50655d325d5f13. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:38Z), 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/TWC230414109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83cf13a1cc95981b93b280b8321dbc2528ce61455418adc93e6d52546a094bc. 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/TWC230614304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c2b7e3a38a87502d51ae2485b8c3b180ecf860aed250a0568f02bb036a0ce6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:53Z), 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/TWC230614306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03d0628a0a88f38031ded8bb63a3029c8403d6ae0b4e940fafa2c07389a468a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TWC230614307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ce5d08b5fa6e633ebcfa85f91397ce75b504245fc66c9d803c0945b6e468ed. 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/TWC230714401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76aef402be4efef8f5cf2c052c1429ee7ab4f57d6bf2ac23780d5f43c23da21b. 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/TWC230714403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded57a030cadaf6ef4205e9f95879b1409ed4c36561f4c455a8cbdd93d9bdf2b. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:37:25Z), 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/TWC230714405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07df7b53bbb3b627739e44751bf4f9f63d8e025bdeb94b757049fee5b4d2837. 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/TWC230714406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369783a0d5db25ac0676afbeded9130a4ce94fcfe0907bf41ffcf1d292778645. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TWC230714409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bc1dc767d40ae70e0c086a0a2d1ae3ef806f8923d8932d2ebff9b72e732f4d. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TWC230814103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc4773ae511afdb9b982f1ab9c34f28518e907ad8252c640f30ac2f9240c751. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:45Z), 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/TWC230414102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6ae7b0ae2a44ed445838dd36c7c75148248e5355bdc1b54fe29d1ddfb1dd3c. 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/TWC230614302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dbbb68c1ae854bf87de4fe321909d45dc4df7432e3e59e1247a3dc897ce710. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TWC230514207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50257635e0dd5bcaa85c481d593aa7885ccf18725f787565c7baaf49d7fc8319. 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/TWC230714407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cc9dea460d7f3dadf63f351771d73668d6cc11421c67aed90a2f82249889fd3. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TWC230614312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c4083c9e20fb6a4e905d9cf4fede104496e8a2b15508dadfcfcf1a168ac4fd. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/TWC230514205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dc1e7415b2f9ef925ccdea0bb19c28ada5848590772c7fe6e856e161a6b740. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TWC230614301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e83d3c0107ac5d7f8c329fae70263ba022cadc6af9be301ca3b375f40b47431. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TWC230514201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eed7d5d1acd11bce426d4c39850b2ffe656ab64e398ff30a057d06aa8ac5733. 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/TWC230514203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac381e98f93c13fc2a44d4c8e6b36fc9ab5f9b48665c709d3813cc0d7bb4a4. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TWC230614303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3efe515f0469a1e3bdd0a84c1b6e14accef7fd772712eb2b2fee3583ddc5861. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TWC230714402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbd5dfdfb478cc71ef4437a7244f12fc437a193bd82db724801478ee8f96f28. 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/TWC230614309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31f5f381b1b13c67ed873a3ab46debb61630dc0314b61321bacebb3f27e8ce5. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TWC231014601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1592990fb0509ddf4726578e7f050ea1c5c0468e8471a114b2c099d59d92e68b. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/TWC231014603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1c2dba17a700256ce00b6b49d0d5caace59809194ba663d9da5abd48fce371. 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/TWC231014604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a28cb59b13b3ea96a56a780d82e1070a7fa68075a720321305f43e312efaeb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TWC231014606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667f0114afad08ffb542d3a9bda14a0ef6b7b7cefaef32fc3322c3dea41c0e3a. 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/TWC231014607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9197759edeeafe671dd83d95e30ea63ee9155e991cd0a618f2c911d097456a. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/TWX351600055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762023e8c5526265ef441b034373691a1b905e118556426a9ebe9d1d233e8bb0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/HKG732286093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eed7d5d1acd11bce426d4c39850b2ffe656ab64e398ff30a057d06aa8ac5733. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWC230514203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb5a832d2a546dc1a49bf89225715984c06c956d2d093f50376cfd9293b826fc. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:57:51Z), 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/TWC230814104.
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