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 0x400c49224e251d11ff4d0d44f781ef0e4b56a867624c1ed01237590e792eed47. 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/0d5881be-1f57-49f3-bf2d-a7a044169ffd.json and https://artists.proofprofile.net/proofs/artist/0d5881be-1f57-49f3-bf2d-a7a044169ffd.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 0xda3118c98e42b8f2de0fa7f12f24c787f6c6908e31df9c0c9f22800dfcfd6e16. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/FRS182128452.
Niềm Vui Em Giữ Nỗi Buồn Đưa Anh (Remix Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66bda567c5e98a45dbb8d9f082958749679cab8e514f13b82e2cd26d1f0cec8b. 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/VNA2F2301687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1dd2f2855faa959ed4acb2418ee6de3a6a2a5e47937e6a3d95060e39d14150. 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/VNA2F2400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4fd71583fdf8b908d2f6151741a6a76b27c58ec176a39b0747e3ae14e8700ff. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZYHM2414433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfcdd8b6e42e29b7741b2844efb8abcbc6bb83df64fb83afe7a6ed362235b95e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/VNA0R2400848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b052e64b38a5a995749641ddeaced1aefe3cd48cf4294f371af1d3de9de92e6. 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/VNA0R2401229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c13320629f6ae751608bfbd5205d708f7aa2eb143aa8b3879957ae47221339f. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/VNA0R2401271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadaa000ff78de02c3d65122cda9a6a355698f740be52fe73db21e88210d6173. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/US39N2510153.
Mashup Remix Đồng Điệu x Chỉ Muốn Bên Em Lúc Này
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9112cb2d58f957297e4f0f127f4d05014a9e0e7bf2f6aa8116865f5105d6e5a3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US39N2518719.
NGƯỜI TÌNH CỦA NẮNG (feat. Anh Tú, Captain, Hải Đăng Doo, Vũ Thịnh & LyLy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b0bf6e28072fd01f731e2bb288cda6d2ded3520c566837306f5298a8ccb0c. 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/US38Y2419536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81b0bf6e28072fd01f731e2bb288cda6d2ded3520c566837306f5298a8ccb0c. 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/US38Y2419536.