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 0x28ef00099f93cd521f3d636d9439c4d4eb400606370c86e34e13f2b288df8952. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24531eb9-d312-4afb-9bdc-9c2f97cd3b86.json and https://artists.proofprofile.net/proofs/artist/24531eb9-d312-4afb-9bdc-9c2f97cd3b86.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 0xfca1953d0ec82a0bf1afcff53dff655a7fc567d831c5da99a05a9844be8aa2fd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:38Z), 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/QZNWY2309859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fadf76db23121742e8b2f5ecd2b0ecc14fd41cf3fc44ffda211f5bf72a803db. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNWY2337466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaea36d8093654dd12b67a8de2c80611eee33a08b98d6fba631df8533c0860e2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZWFJ2366394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32eefaf3383b12a81ed5bd6f8daaeb858af9b5be1c35134c4ef97250df4d259a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFN2329799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc081174924fa0da9de808bde6ab0575127470149d9ef2c0fe620edb0619fad38. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZHN32450716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bf006734e851ec521a7cd0e0f1a3c73e9bb7290c31ae846e69e91728060c89. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:48:56Z), 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/QZTB52497490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x837888da291437c2d19ca434add8572dc0476a47a592d8110137c5b40bd19955. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT3F32476519.