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 0xbb311a891cee90d8cb3ea24e991ae6af55493e34a4cbffcb754636011bf35526. 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/c1e32b83-4a0d-4bb6-a7ec-2004ddfd030a.json and https://artists.proofprofile.net/proofs/artist/c1e32b83-4a0d-4bb6-a7ec-2004ddfd030a.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 0x2b923f170f8aba3b619170e9df740fb7177ceb23c409a3fb1e662ee9ccab76e9. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:30Z), 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/QZHN52086105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5522a2c8fdef5d06e215b4f77d6018f75bb106dcfc63fc8011cce6a7ab22ed. 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/QZFZ22165475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082418505ade2239e14995eb019814fc6730a970132be45d719f13b7fc435368. 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/QZK6H2175672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6b238f903ae340833e48a2b9d6fd5cce09a1cf3baf0f493fabbad1df486c7e. 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/QZNWR2203571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecbd64c1ed4a3907b7743608255bb443bcd7a8ff0ff0ad921bd0bdb6fc6a284f. 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/FRX202357549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0be3a73af71d530d90595881514c932a73d97875b562590d87f875cc4860135. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRX762313442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276e63a380794b7e4429da851fc9ab5959eace037fa619b88710aeb70c05d669. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:14:42Z), 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/DGA092332185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bff87d560424111f05bf9930bddc53caf30fe673e757f67d2270c1cddf3bb3e. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:36Z), 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/QZTAT2499847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c54018411922f3ce201d3c32308b2664fa993a1e3b749097a420f3a0eb5261c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZWDE2208070.