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 0x98bfc33b1c47eb56525f8306ed781af2a25fb797743503d047fdc6263fb925da. 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/58db1be6-a447-457d-8dc0-e65f68826df5.json and https://artists.proofprofile.net/proofs/artist/58db1be6-a447-457d-8dc0-e65f68826df5.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 0xf2c1dcaaf4fbbb992219f48508ef795d09b15c73662115c6c9a51d979793bd18. 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/VNA0F1714782.
Bảo Yến - Giọt thu buồn (Tình khúc Phú Quang)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97793b64bc97de0a44c26f6672f7ed7014035110a0e359950bfbcf5f1cca1f5e. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/VNA0F1714757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac2b7ad2c977c71226d70bf40f9dff421cffa33ab14678985bcf9597179792d2. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/VNA0F1728614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd5f561d53cfa2ae9094cd0e4ca3a3088efab047a589a65b90ba76af5c50fe9. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/VNA0F1728616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1872a0f7b1e67f5d3a6c8943c76b5ac19507f700e4a0b8a569f978ddd320d2d. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/VNA0F1718753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1d65266ef4f9c46092eb493804cf752aa74247271a84e8bc2e769271fd79ec. 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/QZGCD1803546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26d3c714d867a99e82f9eebd30b6d2c91cd250e547da9e8ed27f3ffd84e26ac. 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/QZGCD1803550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a1796078b8e61eaf59a71237c5c2096a9cc1b9681ee66d604634cad5647403. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZGCD1803551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fb2d3b3afd8e8d931a87e258f5a7a099445188235fd5589761a369e6167b02. 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/QZGCD1805331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c1182e4bca97c26902652da2fee90b057b590503439494ceb6aac7d3e4a578. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/VNA0F1799134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf41ea9690c3e3ac6e2c1725d9940eb41bfcb7ef75971efae2a1fcd49b19b90. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/VNA0F1799140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x564f5ffddf85293387f5b4ddd31231777fad7893b23b82e6d940d89795d3935a. 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/VNA0F2006085.
Tình Khúc Quốc Dũng - Em Đã Thấy Mùa Xuân Chưa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86316261143cf3b38484c5f00738ba3642f5b9fecf8f3f2ab19466a3bd05b4e7. 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/VNA0F2006046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53720918cceab87493c3d15d5ccd65d7073b56d073e5a0ecc1e77a2163ecb79. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/VNA0F2006048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a824c8a79ce6ba0a81a87c50dbbd93562944a28fa9caddd6fcf4c8aebda028. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/VNA0F2006049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30673f0da67e3fe8561044b275ca3d6bd3453ef2f264d9a9015cc721c8c62e9e. 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/VNA0M1809359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb68ede12cf50bce35613b1ad515cf6d575f9fa7de68acd3ece349c9c345f413. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/VNA0M1809465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e5a117702c3ddf846fba52b3bbe526d9718bd049f14c991d4875b88570db74. 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/QM48F2003203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47cc1bedaae1cc68e8ff21c1192660fc67c6d4c97a32db20bb397925cb27ba2b. 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/QM48F2003207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e94f6df23d33484279e6c8b43b8bf1ed879024436cd25c6156dc37542b30443. 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/VNA0M1934211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c876069eed135931e2020caef47e0a8ffc52537c11df5539322189a70e6bf25. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/VNA0M1934212.
Liên khúc Đưa Em Vào Hạ, Bài Hương Ca Vô Tận, Video clip: Trúc Hồ vượt biên
Trúc Hồ, Trầm Tử Thiêng - Bước chân Việt Nam (ASIA 54)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60040d69ab62002a69d0c76fb8e2e6630b880254a1e1046ffa45a619c7e64b3c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZGCD1806488.
Tình Ca Trúc Hồ - Tình Yêu và Tình Người
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3def9bab9ffe8b1186be7f20718a58b2358042578437ddcc161d0c6b33171996. 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/QZGCD1803559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc654c32aad6e428e8e353439dc6e6ffd22ea867d179a087aeaa04829d87203. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZGCD1806485.