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 0xdebfc8feaf2da9b4cc243d6278f22dd6709400eab027cc9b79e4096e901cce3b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ae8f154-f02c-4eaf-b3d6-2bf5a5ae74bc.json and https://artists.proofprofile.net/proofs/artist/3ae8f154-f02c-4eaf-b3d6-2bf5a5ae74bc.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 0x956fea95f9aad082be6cf60a19582cbf8bc4862689ce31dda651be406f6d12f0. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QM6MZ1999948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366a5bf9d04efcba13e6ec7ae0b9d2bf1e33ef05087dfaa07d2ddf452d86393a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6N21989631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869716a2552980add744c709afbe14213edeaeded933ae0232e43a5bfd2c64b4. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:47:12Z), 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/QM7281903774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1c63618392cdfd9cd24e91832d6a535c8cfe520c4634ceb481b6cc7b2e8cb8b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM4TX2082657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4923df8609b1de4033cad3af741218f6327bee226dccb0ec6afedc6e96f889e5. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM7282012867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9fad23250b16082332bf9d34a641da718db42c668ac486811615542a3ac6f2d. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:51Z), 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/QMBZ92074723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bb21a971bcab30af628148bf5e1c4c422fcd06c7dffd6d729cb9b5cf1ec7fa. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QM6N22121467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c839336afefcc12862a6392d2dba163838efe8e4095b96d55d90f4734ad2653. 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/QMFME2271889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc13288c02ea7e6b8154dc11a9cb5975aec41cb372f81a6d5e2d87972816260. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QMFME2554495.