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 0xe0438c11cd95b6fd3868106822249a0e21f7947bf5414bfdb3142d5bf13b7b72. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a52531a-9095-4241-8ab3-b2b85f05a0e7.json and https://artists.proofprofile.net/proofs/artist/6a52531a-9095-4241-8ab3-b2b85f05a0e7.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 0x156e09135199c5da5ed5ca0be4e7fa528444b29864619f3d698b863405887eb2. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FR96X2034517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7bcb390ae954fab622222dd2a7549cdc946ee390f499f19e50a49970cbf9e8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR96X2034518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75341e6d9deb6d6e929ece2db95475b2a8f258a8e469bf3e9e95483e0fc8fa6a. 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/FR96X2034519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2291e4ca856345926fd725c37b634ebd962bc24b5ce2b61c8509fac50a084772. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/FR96X2034520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1027a4262a9280215a0d3a86173fd13d43fbe494b1c8c067806036f6728470b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR96X2034521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9874fd4a5c54fb57fe96f02539ea2835ac0a193dfa4082e68167d976e47d8c8. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FR96X2034522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e40f04737770d05c8da46025c348a16632e2c4a55de8aceaaab375a4e2c756. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:35:16Z), 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/FR96X2034523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd778233e67893eca6a0665928f6d7ee5b198af137fb83b969d3393c3d2d84d1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/FR96X2034525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c123664060f7642feb4a442188131bb8634bd386c96ed06b1ba33cf08fc856c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/FR96X2034526.