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 0x1e1eb3fc16335066246cf4d20fd0420a0b2d1eed12b2a5aec15c3df3e5f06a40. Chain 2 (Bitcoin): anchored in block 954131 (2026-06-17T19:19:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7ccaa024-619c-4058-8471-8c66e7894a25.json and https://artists.proofprofile.net/proofs/artist/7ccaa024-619c-4058-8471-8c66e7894a25.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 0x1602a7612847d355feca866254a0ea84a441801279758e095fdbc353fc66287b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/LVA109600311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963eb471949dae67bc04ddd1bf4d9c2ae8a82167f6c9f55480e9946f1c39116e. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/LVA109600312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a447a87daf0cd54bd5501686b3f2fa164bec32ca9075c4083f8d20085e8399. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/LVA109600313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bc53f0fa8449dba07ed833d2e49fe3824e82c7259a1766fbe3073c2f64b1d1. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/LVA109600314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e8d77333ee3ad54ecdfa99ae7679eebbcd419d7ebe893daee6e8ad5e898c0d. 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/LVA109600315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939a8b57ee119874cd052f8b5b7fbc4736be3e31cd8260227d16c56cdcd514f8. 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/LVA109600316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec172344c2a1c07e2ddea021cec4241522b4027456b5fbf4fef7ec856675418. 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/LVA109600317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5e2f0688152081fa2ab6ed6a870cebc422994bd91122d5c78760b04ac489e2. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/LVA109600318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabda2f8f39b93441bd3a24b46bbce8c1a1c2a4166f1aae1cc44069cab2a3efb3. 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/LVA109600319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe361f903412840c05b3d71f16a0ed249ae4064f2307f4ebc735f35141fe72281. 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/LVA109600320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2404212fd9be84ccfd87a86477f2eb42a2cf784266a36fed206f94ec4f4dc0eb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/LVA109600321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ec32efb7a565b0e261cf8df275370f970097fb3878efdb50774731c99752dc. 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/LVA109600322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d869b603de81b20c9d64304453c25430ff32437df4d48e7153b397236428a3d. 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/LVA109600323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939718afcb5e0b6685fb63ad07e93fff702a87019af629d65a48879615288c37. 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/LVA109600324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7320aaaa7e22a7460139f5c6aebd138c699dc4fa5f7d3bf05cfaff91a0b710be. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/LVA109600325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a643fdd2e0228ccdf224c5cfcd40bc2c104a39861e0b9e24c84afff3499df18. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/LVA109600326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef1b1de102908fccb03c2edd5e17500c828e6ea46b05fe28e2f42963a5b289c. 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/LVA109600327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ba6ea35afee50eecf1a75d8f2ce4f711cd8100458c38cff35e17b46aaa0b25e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/LVA109600328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7f555aba8b471c38bd5200918813758a582e38034c4c0d46945c7559b0b971. 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/LVA109600330.