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 0xc3b6d6713b55024685ae0149c021fc1c640e941547907848a247bf2b71ff575a. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c07ef38f-c254-422c-8b30-9bcb7b966a72.json and https://artists.proofprofile.net/proofs/artist/c07ef38f-c254-422c-8b30-9bcb7b966a72.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 0x1385d4a42ddfce0c434bede74c08e6eaa1ab4c800568c2374c97d82a4217ff52. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:28:09Z), 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/QZN4Z2000068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40dea08cb8ab212478ede3ee49f6cbd3c5fd6a64b93cf2c42e33715d2c8aff8. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZN4Z2000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbec8d4428b4da92ea06c8792cf8bbc24e9c7275f3b77723d6bfcaca9fdf6287. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:33:04Z), 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/QMBZ92437491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714b4405cd0ce55af202aaff2e98e6ea8d2693eee72a110f1eb558551fb969ff. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMBZ92437492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85454514f634841c3c8cba30b020a73d3e233d588d605629f54cd88b5e181988. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:06:45Z), 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/QMBZ92437493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09265911b030d3931c8732203e9638ef757ac9bbe1b3b04d74774df1ced76a96. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QMBZ92437494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5159e94ff11c3896c4f5aac11f815b12e2f783ae677b975b40618810b2abc89. 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/QMBZ92437496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8b6c4ed4df99848b58cb50fd564d7c4a491bfc12f2ea0bee1a18d8914697f8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QMBZ92437497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fcb9cf77b89915ebc385a67093d543a4583d76ee03efa731f3df7318b3156f. 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/QMBZ92437498.