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 0xfedc7b9f7fd0d1c4428b1b5ce9d7d5f5579217c9bc9829e13d9513456790b75d. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f698c4da-0567-4777-8df8-346abf872ad2.json and https://artists.proofprofile.net/proofs/artist/f698c4da-0567-4777-8df8-346abf872ad2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tôi ơi đừng tuyệt vọng - Trịnh Vĩnh Trinh - Trịnh Công Sơn - Khánh Ly
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 0x4c2314b6737f0b8ea921a398626b1c00e28eefeadda26a80c89f6074a1f2b96d. 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/VNA0F1736196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b17aa82aeb29a7a28b5b9536773caf2054609dece4719780460c37e0fb4c12. 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/VNA0F1736198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a7aa87e89014e2780bf049fd1c5a0fea6b3b3f9f1af446b800c80a14797643a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/VNA0F1736199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b751cbf58e235d17d905c8e93ed479e8b4dfeddb9c043b00ed9d2002d2d566. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/VNA0F1736200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f3ab5ad2acdda17a1049cd51ea244e08718ebe418678e15a3e3139e36bc357. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:03:12Z), 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/VNA0F1736201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe2a7acc406fbeddd72dcc9856028a30f174d2051c7c232d4d8a1e2c834a646. 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/VNA0F1736202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e57c75b1a77f6055c14534d1f9bc8faf347ec8ff0f80d6ba4d8b8d569aa4b9c. 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/VNA0F1736204.
Trịnh Vĩnh Trinh - Tình yêu tìm thấy (Tình khúc Trịnh Công Sơn)
Em đến từ nghìn xưa (Tình khúc Trịnh Công Sơn) (1941)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eeb05174b2c97e9d106fca342b2a89cf1803b1d8afc21cbb3d5ed8b4ab668f7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:47:43Z), 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/VNA0F1736446.
Tuyển tập nhạc sĩ Văn Cao & Trịnh Công Sơn (Diễm Xưa 111)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aad80ec317db6d13a016b129b557a846c70f5ac8135f2403fd8f83df702164e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/VNA0F1777034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e13752263732d9018b50174b055c8b3321e11939d5bd12f688168cb97b5db53. 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/VNA0F1777039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ac17f32c06f78d21a288be107b628721ef2f332c1bb38e2bd83eb37c07549e. 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/VNA0M1836875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47572633bab04c7b4409a7a3149103c15b1df46d396d8cc52a15de12a94252b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/VNA0M1836878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad66c74833780b3da6b517fcbf32dd4606579c52c4c1868a05246b0bcd35641. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/VNA0M1836881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb49a26285e4a17f4c3e97508d6c0aa5436cbf7082125662999fb4a925321be. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/VNA0M1836882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789a0e530c4cc445e93bde9d033f147788bdd9be0366200f6722dbe289dcf765. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:26:29Z), 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/VNA0M1836926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d847d97d51e5db0b737dbc5c2b8c04e147de4deebdc2256fe788ee614eaf4d. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/VNA0M1836909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2655952f17587df11f932a363c2e5eabc3bb60f1881106d0d8cd580a4a7c4004. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/VNA0M1836967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2655952f17587df11f932a363c2e5eabc3bb60f1881106d0d8cd580a4a7c4004. 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/VNA0M1836967.