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 0xa7a4ac7a2e6a76f15efb419641204800db1ac18ec99af8ec714599747a9ffbf4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc72e4df-8256-478d-b7f4-7c91d34e7374.json and https://artists.proofprofile.net/proofs/artist/dc72e4df-8256-478d-b7f4-7c91d34e7374.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52af96d190253e2b65b6c3c0872ab406fd3aee42bca57dbea3a68a54179f4336. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QMFMF2221600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f080b9f15cf015bfdf96730160165f07114d527bd82b7a8eec306c44ee80d6a. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QMFMF2221602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe691cc50a900b18d73f434c19bba8846f596ad8b62cc6623d5a4ab77788bb44e. 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/QMFMF2221603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25d88c59e5b9e07e87684c97bfdf207cbbb12aaf9c94ccd6d35b6a690877139. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:02:02Z), 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/QMFMF2221627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19817d3ca34938b93f3cbba22354dff481fc31852716e125f5d467f1edc90375. 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/QMFMF2221639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd88764c538c95010ce3c5030db910ee9d69cd5c720811ddbb3900d509a4f40d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QM4TW2328201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0640fe908547ad4eaae1a83c5a24229f255c1614d2eacb351a3a7b7717763b3. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QMFMF2362508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e4a6f80c744cdbc0311a68c8315044dc6eea38afad29676eddfbfa051a9ad2. 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/QMFMF2362517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75468e2095d366deb8480658248b02d4ab9ee35c617707719ed70a3aca23fe2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMFMF2362518.
Anh Tiền Tuyến Em Hậu Phương (feat. Quang Nhân)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c5d83e910862b534c12bdabb3d134c6af00224b79ba38198a2b75b3669ad85. 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/FR96X2182346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a15b42d94763419ec0576af9c27f484612193d39d16b06b2dd9bbe0c60f365b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/VNA0F2501100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57175f260e8cc61b0efc0f7741b2218a4754c09431cf3e15f2b3389178e59edd. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:04:28Z), 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/VNA0F2501105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b1ca22c3c76fb3ab1d031435048e5527e31ad8cda64b78098490b3e66d141. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:26Z), 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/VNA0F2506833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dadb22abf7416e64c85264ef9c6cf0aec9751e4ba461ffe5db38cd46e8bf27. 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/VNA0F2507359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aee2b11fccb8a17bfe0138f254d3c11b486b0926ba3618d81ca5428612ce595. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/VNA0F2508568.