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 0x33f4a0c197518dd9dd9688006df3962614eeef3612a97aaeabca5e5db1e1a356. 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/49c9c5cf-965a-4680-ad24-5df126a9879d.json and https://artists.proofprofile.net/proofs/artist/49c9c5cf-965a-4680-ad24-5df126a9879d.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 0x1fb6fc9b4e131de21b888f798dde378fbf04847ffe5df1cc03288fa16a79836b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFR2562435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9463bf3dde6b67cec40fdcdb9d4af81be2f8ac53a4132cdc6ff402bd3c9a660b. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:19Z), 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/QZWFR2562437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2e6e71874871368a2dace329de91aed1e967d86adf102b547bd6953e2d7e8d. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:55:32Z), 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/QZWFR2562438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eaa3c296b1ea808bc5611e9c9b7562bf9188b2b58a897834884d82528b945a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFR2562439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd658a0c10780dc4cdfbab8ad9fbb3e7df4a8ee0aa70e0b8da65f5240c1af1fa3. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-20T00:23:41Z), 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/QZWFR2562440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc014921e51b9a83b7ac18f36a73d09504ec778d3af22af3eefcec3f6efa2f1b7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZWFR2562441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8aa0bbc116da17afb4d7673136373e890ff0b2ffc1e7b8fde4b494cdd8c042. Chain 2 (Bitcoin): anchored in block 958861 (2026-07-20T10:02:52Z), 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/QZWFR2562442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68eae33f3d9047cce4bb9ccbf7e204c7e6318d7e899a3248144895537dd0a5a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:52:58Z), 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/QZWFR2562443.