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 0xce0b0cc91ecd95ce08258d23e3735eacdf21c5a041cf0db2c507e930788bd7e3. 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/bedc5c73-adf2-4678-b2ad-7d2abc42c383.json and https://artists.proofprofile.net/proofs/artist/bedc5c73-adf2-4678-b2ad-7d2abc42c383.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 0x60c56d7b8c9d685757f999967525accdc82a4e587b1574af608424b156f5d659. 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/QZYHM2401292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a3f742c6abd6b3193660245cb6063bac25ea88fd1458f7039f92ce4dd83fff. 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/QZYHM2373020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd238685f009d3d8f3df9166128a2b8ad4374183d366d3dbaf113833faf3df9. 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/QZYHM2318093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34895671129c8c7b2a2ed5ae584066e0b3548e965eae519ae9350221ff7b204b. 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/QZWBE2376788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c0dd4f778be747e6d9755690fcf2409dae0f93834eb5132539d74dc9e30889. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWBE2372994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b6c335ca86e8f63942c666d337cd6c83325cadad52d77fff5b2d121458afbd. 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/QZWBE2372224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d16d800185ad9682f64fccb1070caba1d849e557615a6623fbf59f54cba93c8. 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/QZWBE2366445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1705177651891ca98d145992b58bdbb7f82007f7374ddc888b98d3a197c7cd23. 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/QZWBE2361082.
Ai Bình Yên Hơn Ai Đậm Sâu Hơn (Lofi Ver.)
Ai Bình Yên Hơn Ai Đậm Sâu Hơn (NH4T Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0375d7def75a42086bfebf05005e4a284a7be23628d92825afb0a7cbe3db91c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWBE2352424.
Ai Bình Yên Hơn Ai Đậm Sâu Hơn (Deep House)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727a463b4da6aacaf79a64a0c03bdad670e1515f0ba591b62943c060e0d482a5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWBE2352834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a733eed0c154b930e2374209ad9e3095f5c3c13d3e95fc71b146016d977149. 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/QZWBE2316052.
Ai Bình Yên Hơn Ai Đậm Sâu Hơn (Thái Anthony Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c90f10d7669e798aac9ef1f081680c670a8860a2659625902137097569506c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZN882283046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c065ebb813e9df5b539dd79954244875ca7e550a13eef37849905a165e2a83f. 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/HKK972228002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3562d4315cc396dbec22ce3cde69e54de5b699616bd62dc1bdcb49dce622eec. 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/HKK972212509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853feb4f8b2d8050aff1ad87cbc24059885ee498a42f938e66467c3dbbd773bc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/HKK972212498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc470576840fab7353afa89815512a468995eed043d69a2b28277e4a38518850. 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/HKK972212512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243c684d87330b73b099be4e6d196af073affc37d2f581bc1fb641f502b8a42c. 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/HKK972212543.