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 0x48e865df79932a1c9f6927305af8a8e8b3adf9316d1eb6274d261f116a00619e. 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/cad41cc0-feb3-4d91-a78f-2b6ccfb2b236.json and https://artists.proofprofile.net/proofs/artist/cad41cc0-feb3-4d91-a78f-2b6ccfb2b236.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 0x85d207e79b8efa71495278dee4aeab1a96cc086a73c457f5504e6bde9d306bbb. 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/VNA0M1908398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819479779e78b73bad78b123da27d7cf17e7dcfa6974ef64903a1871e787fa3b. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/VNA0M1907813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86498c801d452bfa66e23eda8ab5fa7b9491ad535e9bb1b83c85124c826da917. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SGUM72000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c4af9b271ba65e49b89e882bd414fe4bc488848e60681be00011424e797fcb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SGUM72100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd54b6fb7e84fa226d84f8de2fa50a1df395cfd78e6a00211e700d36a96bbf799. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SGUM72100062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c4af9b271ba65e49b89e882bd414fe4bc488848e60681be00011424e797fcb. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/SGUM72100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df5675da8aa616490cd3e0219bcf1488cc34fc575145279a9e0b39dcaaf9e48. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/SGUM72100504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1af1e40d23339c72050d3eb024952f59a3957fdad7524c12b26562391d537272. 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/SGUM72100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28189cb0597127358a526e4766db3735f708d2a17dc0eebe0e63e84fe56fcdb. 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/SGUM72100382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df5675da8aa616490cd3e0219bcf1488cc34fc575145279a9e0b39dcaaf9e48. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/SGUM72100504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6c44a34209b776c45bb3d83bf9a21dee0ca1d9783067fc27ada56d62c53915. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/SGUM72100514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ea0eee97b3565c5d72883aa5daea02398eae84a928207f8c32f7d89d3b8ccb. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/SGUM72100412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a2cb4456514e0fe1377775427b38456d33444c2c24a066eae4147d2b1acda8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SGUM72200608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90227f0d30e4a2a40072d380e7af1c9054a15e98b5727102222c34c154b7c7f0. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/SGUM72200612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fb6fd1a73bc9e2fff63dec860fd026dadcc8539dea5192c29656e0fc908d3b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/SGUM72200624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b17a1fbd563c1f7870ba785da970211c1b23a39b612ea7b48ce954a03c720b. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/SGUM72200625.
Truy Lùng Bảo Vật (feat. 24k.Right, Sofia & Hoàng LV)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79251f5e43c9bc4bd2a14105685439a7ce5e901410169700c5c7a58695073ab5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/US38Y2417286.
Từ A Đến Z (feat. 24k.Right & Thanh Huyy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145f87498f47e3c6d502dc435df59233f1b809e27d042e38904b32928c0c92b1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US38Y2417269.
Từ A Đến Z (feat. 24k.Right & Nhựt Trường)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725c05ba1212cd34998c1179d5c5f7b08685de9fffe840601cccdf3514127286. 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/US38Y2417265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cc1aa4e401af4ccc754827d748a3f409d945b258013fdca7fd2e6c1c871936. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/US38Y2417284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477cb63c574a1bb05c3519ba87d162acaa67af00fe37fc5c8457f4935ed31a67. 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/SGUM72000196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f5c6412b27bf043a21f27ed73ae05ff42f271c4b463f1a61d47b9fc1c75a932. 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/QMFMF2438439.
Ổn Không, Brô (feat. 24k.Right & Yuno Bigboi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff3f83485b9742b9660b1144e80c3ea4ef594b9550f62b919b633f84935e96. 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/US39N2309507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ff3f83485b9742b9660b1144e80c3ea4ef594b9550f62b919b633f84935e96. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US39N2309507.
Người Được Chọn (feat. B Ray, 24k.Right, Dick, CAPTAIN & Đạt G)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5758fb0a980044fef0be34c24c48c003776f092752dbade97881552fd45679. 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/US38Y2301435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895d0b76ca83d034efb2cea11f1604a19b398855419bb69f76879efc70ea98bc. 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/US39N2306137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62a5dfd98a3e3ba8f5b7fa4439becb08da6a527cfad0d109ea375027b88e75b. 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/US39N2313856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bd13bca5660c14cebcc7889fee5000eef6892941af515944a3a114b7f91195. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SGUM72000261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98144a00fba61abb22b86564ef5e27ff000605f352ee8b59c2406aa3c7d9f3dc. 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/SGUM72000245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4646ec0056f795ce778e605430d05864b3b5c4cf66bcef83c62cca453bd21d60. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/SGUM72000128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c77157f8b9ebe94eac3c2dd517ee370aed63fb7b5ed2128b635fb6b745f9c8d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SGUM72000080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6726ae7809e41c871c0931d4be9073c9224d8dd550fb824f86a405a850091b7e. 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/SGUM72000215.
Truy Lùng Bảo Vật (feat. 24k.Right & Sofia)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb81505691d44d38a982493b6ab3b969e63bbf4fc93f6a69c7b755115940263. 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/US38Y2300022.