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 0x2d63239752eef572c6a6e935ac50c8b4d7dcaa8fbe86a361cfdb8d72b7c2852e. 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/dc5827e5-6432-4283-8e6e-c4053f1f23e5.json and https://artists.proofprofile.net/proofs/artist/dc5827e5-6432-4283-8e6e-c4053f1f23e5.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 0x1cfc7bff48b44347b3581d2de6da10f1bfcb1e8ed50fc921a61aca810c48bab3. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:43:41Z), 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/QZFYY1914547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685c1b641d0a84cf8ceb6909fcac15eb4769e2b3a0bceacdfb1ab496500cfca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:10:14Z), 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/QZFYY1914548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aeb9bad6c2d9745d925f9c455005da13fb59344ca56d72f9555b46a49c40237. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFYY1914550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3da7dbcd6f94dcf948c6fc417c5b9e44e262c2bbd11e239ab48cea55827f38. 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/QZFYY1914551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03748194e18986f23ae1360d78238e1a1d729a781378fada64ae6df68226450f. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:51:33Z), 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/QZFZ32015970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d4141dd148a69828e8e9a7cdcebf0bbe1358315ec4239656efc831f982d886. Chain 2 (Bitcoin): anchored in block 958495 (2026-07-18T04:39:02Z), 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/QZMEQ2464430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753dbd51aaea0d7950477c2f2bc32674708fb7abfa3f4bd1e8a144f25d988a7f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMEQ2464434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ae650fac96f0df8643ed71389834d2581e7e1da5a786033eef71c2cff94448. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZMEQ2464441.