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 0xd5b9026055992af898c5b51eb9d6d5d7365cc0fafb5b62f1d76a399162a6ad47. 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/d68aafe4-89b7-44c6-b7fb-54f5d9bca5d5.json and https://artists.proofprofile.net/proofs/artist/d68aafe4-89b7-44c6-b7fb-54f5d9bca5d5.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 0x5558f51b124d979590d3c59cdcc153e9c9dfe6355907a4d02080408279d1d78f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBARL0800944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c1939ca984e695977a7f787e85b217c5ef066b395fb008a797f30ac548c373. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBARL0800947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf044c6d31527a6bb47675d8190ccf037d5b49668488451cc68fa7708481c6dc3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/GBARL0800948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678203c7cda82e2506ba477fd3a5bbe69fcc7fa5ecbd9cee5bf0a81fb51c3132. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/GBARL0800950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa362b8943b6d70524ece51d13f3e2254427a0f3452f31d2d97a3f6c6a8cdad9b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBARL0800951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d56ba74db5d2169b0d02eb47e33dc0c6554c518cc024513297852efb66db5ba. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/GBARL0700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001439380495ead8cbfc3d8b73fbb86519b95361da609866c33d8a7625b2b116. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/GBARL0700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2506c2f908761b704bf9929bf8b63f841d2b4bb82eaec6b35d3caa29fc8c201. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBARL0700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8575f1103f76358197b67c35cc97c4d2ad3b4bc9906a8e9dae93d7e159742579. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBARL0700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be4504072ab60084dad9a28d24105419351fff18875b3057652a352488be857. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBARL0700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d69355b989145f047575bd04a05dc71ee2f454bd56029cc43bc766df3b70bde. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBARL0700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e63e8f24bae4814fb71c0602eee8a43b43f2b5d4e91b74836ec2b2a881e169d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2529479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45f5ebe32bfa8a35a5ddb6bd3a9ad04b0e90ced21b3756043aa44a024d97c6c. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/GX53U2556686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2271a6164417fef047627d51ccc593cc4a47b7d5822ef081adb1f4facd838f. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GX53U2562803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb4e207b8df0bf8721927d7e7a6bf231ed52763307987b460fee41e852b408c. 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/GBARL0800949.