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 0xeaa7277a9f44d71928a6316a73442e766426e8a51808cb4540d5859c4f1b4291. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/95b1700b-0a3c-43fb-a704-2936aa127f5e.json and https://artists.proofprofile.net/proofs/artist/95b1700b-0a3c-43fb-a704-2936aa127f5e.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 0x72c9d9a90d084275128c23f5fa35c7543feaba31329fd901262dc32d3073b284. 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/QZTB22208798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99b0139d1e769f46bde483b3112d463c08fe7e5bb56f64cd34303152ade02bf. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:01:13Z), 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/QZTB22208797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d15ed24c38e189528b23d28409a39ec612f99c262ca9823c4853ad1edd8169c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:21:16Z), 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/QZTB22209404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf77ee99069efcb6d63a1bc18434b3f073574182ab2fe8c175b90f5ff36104b4b. 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/QZTB22209406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2971c2817583a91da36bd7e275068be4b4c636ecad2690fcfb72171146e7ba55. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZTB22209410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43af82672dbb08168d092993f7913db6fece575d79c421f81fc5447083786892. 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/QZTB22207572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5a2de676869d38ce362366a99211c6bf298b3cb6f1d179994243b05594d7a1. 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/QZTB22209408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa284d1c5b456c987d4a30a374f8fee03a92692010fe47d2133091196e6f047. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHN42391063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f8dc55e658fe1c16e4b3ad383a3911a302e28a7f2406959c53361a6df628364. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN42391069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0df94d5053a8a0efd9696e8291a85346afcb57e65dd812144b87ff41490b19d. 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/QZHN42391073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ef7e4ea72a25f5c46f72abd47ec0279dc50ccb3dd61f5e17e1280e9210df13. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZHN42391065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10f5ffdc0a84a22a5583f8609f3cb9ffe50326df854d77f497c922c4f89985c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN42391068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9e08eeaaa5586d594da984994ae2c27f1061c6308b664fb5b6fe250640eae3. 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/QZHN42391071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc526a631cd49f8694807d803c837a2602b3944db6ff1b86f3b0fcfd8f1f0e38f. 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/QZHN42391066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7bbbd9c708a1972719f1eb5057304fec6460274fe93fcb713750cf5153c3df. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/QZWFQ2331370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8d709844bb141a12d5b06dc39e14ec7272fe2448a899f4c84af20c49c0b78e. 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/QZNWS2548471.