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 0xba30ec22e6d5c93d102eb1a356894ee59525700a4da2424a922c9372998d1069. Chain 2 (Bitcoin): anchored in block 953736 (2026-06-15T03:21:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/982524bb-5587-4838-9ed1-5261edda2f9c.json and https://artists.proofprofile.net/proofs/artist/982524bb-5587-4838-9ed1-5261edda2f9c.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 0xe13e739d003a5c85f2564a2efcbde506ded3f39fa4e427924f977d57d674382e. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:51:37Z), 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/TCACK1577907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5d229008295bcdc8ac13315687cfa662a75c41d8854ea99c94f9fca91e20f8. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:08:15Z), 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/TCACK1577913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b7a179ed50d5fa2900e9eaa37daee7791311680953c84732757fdd9539d3713. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCACK1577914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0ea44890d63c4ebf24de87fd1a1ceb9bc4da01188647ab7459dc19709fc2d6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCACK1577917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa18d7c9e82160bc5d530d7ea30a20eb801452a8b9b863465f525f48c36e0f08. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCACK1577920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d91292af105cef66cfb5c9cb791ffed3046f383cf7b6c3ea582d32c77d97cd1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCACK1577922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e686882d03d184f1e308f4d56f58f12429b7be115dabd0a9d3dfdc6fa3cd665. 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/TCACK1577925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97854c9655ea8f4f21cd6a4f9fa5f88827e529d1e3bf75ab6c6834fd7dc1839. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/TCACK1577926.