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 0xa676fae1a586f00d03876869bc0c8de53491563e6d046ca4a754c307bbeef5b8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/77a35758-553d-4986-b1b3-d08a53691c37.json and https://artists.proofprofile.net/proofs/artist/77a35758-553d-4986-b1b3-d08a53691c37.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 0xa650f81ba31c541c79bda81b9e1789e59b51dcbe9d9d84e1e565da42dd3b9d3f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNB2204246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x991b9c379880316c189b7827831a24fd5d6f2c7e81b86c527fc03e2852fd0e6f. 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/QZHNB2204248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb8544f4a66a1e467fee3d654559ad11d443a1444667c0d4b52fffc2f94ba2f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNB2204251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead4f274a3045e0b7412bc755d7056068328f4c993432bd4b49e4c10de676265. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNB2204252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcf2c3abcc71a21fc4c84a8f17e13319ae4b0e0b783e799a952b898b582d113. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZHNB2204253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e71b341c8783dd88efbf75e947d7dc31e343b6b3ada1ebaec2412dca5582b02. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZHNB2204254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36af5d3b39ccee254af6ecc7485e8baa5de56a00a7545db2d9d629288c8d12f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNB2204256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e28a32e84c7723af2e7ee8d9e0b2264cbee69f9f7a891011784a1ae827dee6. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-19T22:39:48Z), 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/QZHNB2204257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe67712780d851233b05a35f6f8d3164c2ec4c0c37de906a443cecce85770ee88. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:55Z), 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/QZHNB2204258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64d61d8299f9d48e2d297537cdddb5ce13cfb9f71a01bba1c13c60ddd195d7ac. 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/QZMEM2548432.