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 0x1b80d6097d0ef5687d85e7f9439065c760993b292425e659879ded98e18c4b15. 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/53ffca86-bbde-47ef-8e1c-549028d000eb.json and https://artists.proofprofile.net/proofs/artist/53ffca86-bbde-47ef-8e1c-549028d000eb.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 0x5b958b9e0d9a9766edde552154951d1b28e42d7e606817a8ee27b7f16d196a83. 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/VNA0D2401544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472ecd5bc0367f3498612933eb21c7b3a560146d68cd125961d96ae364a8418f. 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/DGA082496295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472ecd5bc0367f3498612933eb21c7b3a560146d68cd125961d96ae364a8418f. 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/DGA082496295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62b4b29d0f3e904b5f88e4b2190e7f5d1448d39605a31b3d762f6d1f25cc4ec. 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/DGA082478056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62b4b29d0f3e904b5f88e4b2190e7f5d1448d39605a31b3d762f6d1f25cc4ec. 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/DGA082478056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0061eb54e30312520848cc52a4add1e1b9c2f2075e0717d33fef86b8d3d09806. 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/VNA2F2400733.
Em Chỉ Im Lặng, Spotlight (Live at ZLAB)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165a50f4ed4f8387f74e915e27e8af9feabc756a0bf3227a030c0d164c98d9c0. 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/VNA2F2400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0023ede6ac6eaf7b58c0b1a590b0050920adafe2734078f5f3ec39fe0e0a95ad. 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/VNA092303179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91faf8511fdd2f9635ccd1f744d5ea454f2985bf0b517f511431c0fdfd2fdc51. 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/VNA2F2302053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea95dc8fa72ccff815bfcca70b443ec4518806f803aef32a7badeed05ee2730. 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/VNA2F2302054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3733681ac38af4b002973dfff7407a36adf8a7321d1ede5dd96af22dfd1372d. 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/VNA2F2301749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea980f241cadf6c9729a82f778dfc83a73046d0cff2abb8bbf96ce1f2ae3f684. 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/VNA2F2301750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c7ed78b12b0a6425d22d39f81f3b9e6d17040621055f697ad5bade8afa0b0b. 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/VNA2F2301751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce884ac2c95d7f68417322b5c59005212476c0735f20884fef0f4cb70539b73a. 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/VNA2F2301752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e01491017782b992f5098c17bed03b380fdf633989d95bd07a22aacc0a082f. 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/VNA092300786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca6c37915ec0d00744f80c8a3846b35144535aca0380f02f68f33da369a253c. 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/VNA2E2210393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2e7d602fe838f8173ea2b5bb13749bc0b116efd15bafb762e4c9257d7a8c9e. 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/VNA0M1928922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194a9dd85495d5350b0f363e3e62ce3ad8850464fa843e7a214d2236a46e1ca2. 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/VNA0M1928973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d84d7a7749846861a25f9222716bf97c09539b269297a5923c2a2fa43a6d72. 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/VNA0M1929022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7c235bbade78208d88216a9bdc6ba58e9d1e32c8bef7a18fdefd48548e9b34. 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/QZWBE2252805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2e7d602fe838f8173ea2b5bb13749bc0b116efd15bafb762e4c9257d7a8c9e. 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/VNA0M1928922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7225de14d0ea77f99283ac91865d709e1b4d6ff9167b8890697b3bc6b87a647. 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/FRX452201617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca139db8635535273867552b989d2de049fdb01989eec42969b1ae2a65c76af. 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/VNA0R2000659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607049bceb7c2c0a7748e6d620dc91e646627524efe4c4809e79348d2cb35968. 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/FR59R2227200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9b2d88fae935008d8df758470e86488d0875428755f1c6da3e356795ad38a. 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/VNA1M2101143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb69e8cdf054e44f89252f67715f903312cdddecd99dbac74700b9f7f40141a0. 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/HKK972206574.
Anh Và Em (Theme Song From "Bí Mật Của Gió")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ef24108dda1e52ee401b36c1b544db369a3c9a49dd974f1b94df315cad4dba. 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/VNA0M1918619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0511b561fa4bc87fa3fff99d57561d180411711deca4689b09eaecc9dfb6222f. 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/FRX202173948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa441b0bba052d0e31abf13970c20ac99ceccfca25979d27bf639f3229ea3de. 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/FR59R2194523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68694033bb8b2c9b29f83fd006857203c75c481afef3c4f86a013fe0133c2b2. 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/VNA0M1913848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0225d98197962623805506f6e394ec0d63553c69a4013bd98aecf6920bb9bf1f. 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/VNA0M1908583.