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 0xf3557797d479ea83d5d41b7227305f62df85627885bca677daad2d83b2b1c625. 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/3aaf1ee8-ff9e-4e41-9119-39a59b5af0f8.json and https://artists.proofprofile.net/proofs/artist/3aaf1ee8-ff9e-4e41-9119-39a59b5af0f8.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 0xbcc3c6e850206dafb024f4fcfbc7e4ea8852072d7a42e219332ad30949b074e2. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZHNB2255130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79a1c1d60d8d947b2ceca15cff17fe50404ba17bd3f6562b4d35bb28f08274. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHNB2255131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70836ebc64f4fe887bb609e9cf94b19b1165ac780fcc20c5fb066a1b5a41fa29. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:42:00Z), 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/QZHNB2255136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd63d81dcf9259df0a120997c76cf1110d3e08ab6d8de1dcfeeb2838f59e864. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHNB2255138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ddbb524a5e232df96250c52197440c533b12f0544b5474cc3192089ee1cb4e. 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/QZHNB2255142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2129dfcf7b2be8916b8c508c0cfc114c70c48bd7c7cee66b0d4e8ea8e9e4ec. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB2255143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241b53e231f4e27aeed2f95eed2e6c8b7b6336fa285957c6b5e032b63d56ab37. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:34:36Z), 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/QZHNB2255145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601d427aa65a688282ec263902601664e98f2dcb22857926a006310997ff44f3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHNB2255147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9357d79dd19de0c88ad93f57e614af806e5e7c1f6576b4bf75b12f2110b72a. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZHNB2255148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef8106737f79ee301b6acafa44aa0cb66bc56c24f63528749c0206f9b632aef. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR9W12250577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c427fbef4a2d6ef46a577b61be96b97e9c27ead5d3bb81352e528e1bd5d21e0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:07:19Z), 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/FR9W12341109.