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 0x5f6f52de24e6f36285e385f379d3d463c4e58bc4d2b2b58e96a1b1de631ad3fb. 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/59121402-a067-4042-9a99-46f390a38c3c.json and https://artists.proofprofile.net/proofs/artist/59121402-a067-4042-9a99-46f390a38c3c.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 0x70f474be95b04ce47908439304c6bbf0ac13d9fa51e8ae098aee8880fe53dd80. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/FRX452083655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e07b0a196d15d8354245d9b38173efd576b082da2dc74f6316ffde5fa84752b. 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/VNA0M1910237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x577f71899e0148638e9acd0d7ff1b52cd71efcab1aafe121ed764e05d78d1927. 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/VNA0M1914750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d66f6d7fa7ead95bd899b3398336eb56d5c16a16b723723b3318718402edb1a. 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/QZRP42124241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef8d63725937982c3ed05216a5e1181cf1d5d52ac7a223c08d4a4d1d20aa741. 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/FR10S2223258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b47716b8a8590e5cd5e727a525a7646dc54086dbdcc27080390557ce962557. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/FR10S2243819.
Mashup Chỉ Một Đêm Nữa Thôi, Chill Dream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956293dbddb0a3cffb81b5027fc310374664d866545a4745bc85a095a36cb9aa. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/VNA0M1926857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15218a86fe6fd9b3e221c78f62074597504d49848e36deb5a1cd457a8a77034d. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZN882228197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5032a3464fd3be33eeeb9299c6e1072695f0132950c0283ef6223278409b97b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA052251863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d03ead25e206e1ff1293af58cd11f1dee851c212f55611109564b5b073b0f8. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/DGA082207770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6839b6da91c06fffc20b9c3699ec770b4873c13fbb874a3ee4bd336e4d1b94. 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/FR10S2314422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e933b51261d90638f873c3938fe6399fcb67856bbb6c062ddcda4de52e5412. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/US39N2308368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a9d9ab87dffd02849bb5452e39f51b8f8b3da7385fb33b0124f62ece43d89c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFF2397670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438be4609434a9e83c891182ebe0c6e050a119f06c161918a66f4ce9c5adbd00. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZTBF2479549.
Không Yêu Xin Đừng Nói (Prod Kirimi Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd094b680649b31b4d1e4449eb0e5daa81b027062ffa756ca6861b72aaba6736. 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/VNA0R2401416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16c090d4a9cfefe154dd733b11bde7718e51604bd0624aa33889936fbd555db. 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/VNA0R2401418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211f24dcd0f5180ff8b0356640d9f0e6f59014a73c4f524c27c3b0b4d503fe23. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/VNA0R2401419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b64ab600b08ba779170be2c55a816922755c04cefca2d4e46d4243afec0f10c. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/VNA0R2401420.
Không Yêu Xin Đừng Nói - Piano Version (HITStory Live Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86fe064743ccdb44a4fb27437bd962439a27fb2978b1f9bb47be61d1491d225. 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/QMBZ92563235.
Baby Gọi Cho Anh (feat. CAPTAIN, UMIE & Duzme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bdf0b9f465571501210069bb6409aea986afb7da2ebda1a477709a0c85af70. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/US38Y2417278.
Baby Gọi Cho Anh (feat. CAPTAIN, UMIE & Thanh Huyy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebc4951ba3afddf6e668a92cc6add164123ecc1be1c11209e5ffff953e8f5ce. 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/US38Y2417266.
Anh Là Ai? (feat. Dick, DT, UMIE & Thanh Huyy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22c05f3b411db73426b8e928cbf3d06c7e9af529518a4a1fd196e3255a514d4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/US38Y2417263.
Anh Là Ai? (feat. Dick, DT, UMIE & Hoàng LV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71630f13e424a0e29123a8169856fa2b7f6603971d087fef5435224d4046ca08. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/US38Y2417270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbb98c1199d1460ccc488006c1a1975f7d67feeeb43e3d2dfb39bd7d5dae4b0. 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/QZTAS2137681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dffe3ea7531dc182cab4dc50c00fb304e80a1d21c83a80a935783720c146145. 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/US39N2309505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbabb7998631b51e277a541128453c73182dffcbfd318067ff668b91e45643b1. 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/US39N2309506.
Con Gái Phải Sang (feat. UMIE & Ngô Lan Hương)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c50ea239bdd519ff74a2fecf3653b979292c376042085f3945ca467a47ed6c. 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/US39N2308509.
Baby Gọi Cho Anh (feat. CAPTAIN & UMIE) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f8c07cdc49aad12f6d8fd8a22fcf258abc4cd058d88526d89c712fa3d5eba9. 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/US38Y2415218.
Anh Là Ai? Ver 2 (feat. Dick, DT Tập Rap & UMIE) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978c8e0ee6dab5bd4b9f174f569c89c80c33040215c8b9146404db1cf3786259. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US38Y2415219.
Anh Là Ai? (feat. Dick, DT Tập Rap & UMIE) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8630ed12a400a9e2cebdc5ce898d97f080e0faf31ecc32295d9c0ad4761953eb. 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/US38Y2415220.
Anh Là Ai? (feat. Dick, DT Tập Rap & UMIE) - Lofi Quanvrox
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd8793bcd83845775e9718789157f4543186d58cf624211f8cfac88787af3b9. 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/US38Y2415534.
Baby Gọi Cho Anh (feat. CAPTAIN & UMIE) - Lofi Minn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f623051cb7552c25c5cf38b32f89311d4d1df59eb7e23821bd45e8984e2c8a8. 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/US38Y2415588.