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 0x8d6d167ab4d2317e69ad021b26de4332dd33f4a2b5abdb6c330a32fdd630367b. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c43e165-bc1e-449b-9c1e-5767fbabb946.json and https://artists.proofprofile.net/proofs/artist/3c43e165-bc1e-449b-9c1e-5767fbabb946.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 0x4fc6c0c6bf681f05b15fbcdfa380d428cf94349d98945d0034a800a37c22b184. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIRHO2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8d3c5aacb47234d055c0387657d21bd50dd8ec208ea29eb0550727b3c825c2. 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/FIJ7H1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dae3192787d0fa2a27931864fbfebf3785d71c23540508928f8e366e739cb05. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIJ7H1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79bb3e330010ff3b4fff74f80a7d3166bc9f26d2332e84bffd58798c3a13a690. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIJ7H1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc21637c7961d7ea527691cd797702ba4056db50e853ce819142eefd991bc6bd9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIJ7H1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd075514e10a890301a2e882bc3a90be8edb16d6437b6f6efcf35a495ed4b5a30. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/FIWBB1600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0664e0c1641cc70e030ecd2743172337c7a36462eee3c6c173ac4c9591cfb0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIWBB1600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4865e7c04c7e505a745a5a500412aa6c773a9dcf01dd75fed134d64695725e67. 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/FIWBB1600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4854fbca6751e32027c8e379b119fc503fa2a14b48de41fb09462e325eed7eaf. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIWBB1600041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7c92374c6b941a0f92c1fa9a742c6c9a37b1c3b74e60d1ef0581c3149566f4. 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/FIWBB1600043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4e9a17c7cba0f647def1dd1b568c16142c814bb659db2a85407ccc511024d7. 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/FIWBB1600044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa47b8d5779a4820777b286adb3edb0ac911a8133e95bae5a131c3d78add6bc4f. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FIWBB1600045.
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 0x7ee36937fa5826c2cf8911c88db549615dad9b2c4580e728fb5f8167c6927dc6. 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/FIARA1200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e35e91be461888a62c76659d9aa4ccf7266c545fa7ce71791d84bb6c8675aa7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FIARA1200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c6a1a2ef7b81f986829e695b60441d71fa77bf4a08df7d8672f0b12db099b2. 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/FIARA1200040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe847a3dd08ebcc140fbba3919acbd97501851794e2314443f77d162ad260753a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/FIARA1200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877334ef41543b40cffd8d4f8fc58e726b57ed24f6748c55675155eae4974d7b. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FIARA1200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e9a6629121c12e1edb3d0048b1036efbeec171b90640f1465df4a6ed43e3ab. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FIARA1200043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e9559f2d9dc338149ae0f6130a29dbe230a7f9cfc44923bdeac6c0b2b9165. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FIMMS2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f59d4eb5cfd93e747c824199661470c643c36782e19e428bbc47229d35b1c42. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/FIMMS2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930df4f3e4b6250b4633ded431314f978f8589e3e23b0fd3c3471fc9d41f3904. 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/FIMTA9800128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf62f99036ab0df7185f2433bd4e8b86d3a900e6b2db09876cde7aef925fac97. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FIMTA9600087.