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 0x13971b4640b37b6ee5b8bbf6e024ada0b586d3fdb09dd56f7ec86b2362b7f6b4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2c6e7f48-63cf-4842-b2cc-4d406f75ce7b.json and https://artists.proofprofile.net/proofs/artist/2c6e7f48-63cf-4842-b2cc-4d406f75ce7b.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 0x8ee486536f62db5b9b0386bfc13e34c1df466babb3791866723f6596b6b822c0. 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/VNA0M1846800.
Tháng Mười Ba (feat. Lâm Ngọc Yến Nhung)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa907d3ef1c912e0c572a47eb005d74171d40a88b56e91d74983de21da40bcf23. 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/US38Y2428569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52540a825e5279beb70768b41a8d1fb20adc9a099f38eb43a2f7049c6ed27ec2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA0M2392715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0aebb903e6efa7a0ba9d16f8735c1e9acf6fe30e2c112f400872b4d21c1789e. 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/DGA0Q2367689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0072f8511c490c743460e45e850c6d16b0f0b59c159fb28f971b6635ab6518c2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/US38Y2416393.
Buồn Không Em / Nếu Em Ở Lại - Live At Drunk On Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bf1177092f1da7b1c5b548a9d23bd64107384175aa5009700aa3923eca12ae. 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/FRX452219174.
Đường Một Chiều - Live At Drunk On Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6ac37316771dcf249924329198f83734855ab3e0cc6af9adc092102b8bac29. 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/FRX452219175.
Nỗi Buồn Rơi Dưới Gót Giày - Live At Drunk On Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31683912c20162635eade725c344611063f8d70e8c5c9c30412840b301be5b97. 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/FRX452219176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9801dce10644505a7afc7671786f476babf2eb8fe75a233fef05583ac40cdbb1. 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/FRX452219177.
Yêu Không Hối Tiếc - Live At Drunk On Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a488338ecf5b634ab5e7834681738a36c27f8b3013e65c4e740792f2037936. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/FRX452219179.
Đừng Quên Tên Anh - Live At Drunk On Music
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff513427b11fe8cbc143220419a42712f7e1baaa1214a1d9580ef388a929f60. 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/FRX452219180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a1d1c4cd778936a6c3571493a4a174995a82cd24c4ca5c41d0885cffac23f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX452219181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6748656a333e7a9d65f4f66e4f03afa8638ea37da9cf7b02d6640886629bf30. 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/FRX452219184.
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