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 0x418a240c78ecb8fa3137befa72f152a2da7e43028699d2bd822ffe7419cb1e37. 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/cdeb3068-304c-49fd-8dfa-f271f27f605d.json and https://artists.proofprofile.net/proofs/artist/cdeb3068-304c-49fd-8dfa-f271f27f605d.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 0x78c32e8489d448da31373aa4078e36dacdddc2838cfaad3b2ce5bc536393bd6f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZCE61854554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7873c4c9cadac20febeabacc915e6ed3a78b2b9ba75a853dfa1dde6a94c178. 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/QZDA61950068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4930ed0072959954e44be87be7093015466464aa0add112c7eecf340b6b7e883. 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/QZDA61950069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674cda2211f16e1304354f7be79019e7cad50a2c7c27dc506c16adee699b17c2. 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/QZDA61950071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4956465d1522ed7c83acab310f36d696f1979ae8bc7a61b199b20b1a29c9d9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZDA61950067.
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 0x27ccb06bac8c4a3212202366f91b256c736c2926d74fd4e574c80b1faed498b4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZDA61950072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d45176f22be6d000ef5aef662e22a210c5418a1d25aa64e8224145568b266b. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZDA61950074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb82feb6526a7f0380fbc8056c11c3101afb4ecb1ae5c96b5ee0cf03152a1f6f6. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZDA61950078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204912c8b442397dda89f18e4b7c70b340f695779b9962850b85eeda7be4326b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTAZ2271017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb24ff50f74f56fe778e7dc7ad462b8bdbbf8febe4c17359735e714adc47059f. 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/QZTAZ2271025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c3d40cfdb895517bc94f6dce742dc99a88fc359f108a1d12d1e220ff6598ab. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:49:10Z), 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/QZTAZ2271028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2464ce356595316bea92815f7d0a9a6d04aaaaf06ec4fa5d9418ff6a183f7426. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:08:37Z), 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/QZTB22264755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384051b865e4d55b9e73e219b51e1047a19e1590652682497a54726497526fe9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTB22264757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6edc64aa127db4e0dc31100a1504efd806427f36856425400177ea5697d6a9b. 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/QZTB22264758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d33aa8b8cc904fb15d4e77fef34b5baddfcbe989375dcb9395b8238561817f7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZTB22264761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510f0fb9344d95af50def49ee1f5092c290c24203af1d668cb0ec3428f7a7f1f. 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/QZTB32208490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c20de0788577413ffbaebdc141bb8d6454f7f524afde1f6284b544d9a41965b. 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/QZTB32208491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cc9c39698a7566a6b22d55edf61a261f462ce469102d923ba3c675340d3c56. 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/QZTB32208492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e890e2b9819165307e4880dc65b6571035a89ceda2d507f41f23af38ce4ecf9. 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/QZTB32208495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21edbf83663744732ab998612fe09170fbbdf1a91dae8f72e897e57545d7ea4. 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/QZTB32208496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce49d8b25462ab47f139e27bee6566e9a508d2d2b61bfd5d2f22354f9567faa. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QZTB32208493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a740bfd78e8b574babafc02885a51f6045774c4c6dce9ac63aad048958c45. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/QZTB32208494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x661ae8f66b44e2fc34dca8202f75e36a0438b3e8d38baddaf72246fa20e01599. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB62247259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbb2ce8b32ca4cb7973570572cb1e8ecad33e0a1ca295afbd2b0976a0ca5390. 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/TCAHS2314556.