thumb|Totality during the solar eclipse of August 11, 1999, showing the solar corona and prominences thumb|The lunar umbra on Earth during the solar eclipse of August 21, 2017, as seen from space An
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 0xef567b6a205dc67674a968417fea95c494728cc33ab53fa539cb5a53ace1dc8d. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d492c7b6-397b-44eb-a5ed-816461470928.json and https://artists.proofprofile.net/proofs/artist/d492c7b6-397b-44eb-a5ed-816461470928.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 0xac17aa9ee445d46ae9ad41dcdf13d8d90e2605d772708e12e08fa0cde8df381b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBTWT0900492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc077b7bd0713654ea3f8a57ab0d246d84b032cfb6ceeaf85227742e9e495db8. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:46:58Z), 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/GBKQU1026246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196f04a46c0f51c9449c26acb3aec994b655170db84ec0d8efd928f1bc08cd1b. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBKQU1026231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd1238f2d2302d2cb0fc775d9110b378458a580939fcb2809519581aa93a14e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKQU1026251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2339364c9d29c6a577dec6193b695cbbca68f63e953e42274a23fc829a10e768. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBKQU1026252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa2fd3ec814bcbe3269ed9559de526cb2950fc4ac68f5b14fdf737193348e9f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBKQU1026277.