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 0x5694a1705a7d5b788de4b684ff84e1fb8259b5c0d3b84bdc0fac4add53049982. 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/ed926a5f-aa5d-4ccf-9b56-a98c2b0811ce.json and https://artists.proofprofile.net/proofs/artist/ed926a5f-aa5d-4ccf-9b56-a98c2b0811ce.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 0xedc8318324f2cda0dbe865a6281546cd40a03a6257d07766f20ba8ead37f5d7f. 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/GBLPF0604570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90eec864502cfe7d7e8933d36bccd03fdae3544cf3d0872d8f0af1d0a9e77b7. 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/GBLPF0207383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb916c2f02d11a6d604eb2b87382f0d1ad76ff8771c2721c61f9e1f155ab7698e. 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/GBLPF0210879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2fd08e95edefdd0b0f7d856e3d36e3fc82f5f5bf7b72748bfa667e214761f5. 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/GBLPF0213135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45d2e0c030a3d49fbb942ffdac091377f4c15ed2d1d1d9a6e220a3c9ca9c2da8. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:18Z), 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/GBLPF0215584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6648ca0436059725ed4f018e0e4e16864796b64f18e302408620fa5389d13c. 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/GBLPF6809557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c5c586ac86c344db646bee5dd33fff5411427e0d208c8c7c76b7b61f59cb577. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/GBLPF6782985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579bd22fca25a440883cf180467ee63bce913e46d1adc488b6d0a7e09dc287bd. 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/GBLPF6765586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5782185b2bd509a8dc4741ede617a8ce84e684b8cc5f18f595cdcd2e0ca56067. 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/GBLPF6754525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fc393993232deca9bc3c993696dcb801af3daa3bfcfce6beeb1eb3f0412500. 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/GBLPF6709890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7e16d4a345c8c51d4d66cc1cc6b326256af633dba6593950decdf7e3468d36. 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/ES5152100961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f2aa4e735d63914f0c4f163a41ae549a63b95a258e86f1096e10a04562ec00. 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/GBLPF6688682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3250b61b428a89f8c1fa8388a12e188fab3d90085da3808fed6f4cd3ec6a2982. 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/GBLPF6678473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87af4c83a5d5c13f0b9de7d03d61c58f980972af13015bf0b6f8073d8e1be57. 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/GBLPF0299334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6730ab0875c3fd1749764274d7819763fbde1ae4cf0291ac1d717cc751cae0f7. 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/GBLPF0284834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9604c56b9054d80b240ade188ea2a429235943b7790950c057c2baafa847610. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:35:48Z), 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/GBLPF0281948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f42451e7a03da6023009b9bfe158ef81248491ab53317e2a2b664e6b74c9521. 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/GBLPF0266111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530d9747bb16b9a12a1fd41b3baa47faa430b7b3882e13dcd2e118d8a4ffabe8. 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/GBLPF0263801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48dd8cc17e23e5fc1c63ab3957f7c1a1a62ac0467a1ddc9b4b0914148d9669ba. 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/GBLPF0262552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb8d73471c95a89133eae40855855b054422a518d435aee1c872a44d442b8d6. 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/GBLPF0259698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d084623196b2027e790ce54cc6b030303bd47982c94522ec0124605859c51f5. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/GBLPF0260343.