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 0xdc9780fbba1106a895875275caa4f01a8fb888575ad667bb77b8e7407e8a811a. 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/75afb2ad-07a9-4634-b37f-41b8e36c4855.json and https://artists.proofprofile.net/proofs/artist/75afb2ad-07a9-4634-b37f-41b8e36c4855.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 0x923594e994b76989a8d90dfaa8d76d43201f4dda384b046c33d4720aaf74cc8c. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZDA81819768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6e0ffe67be8ac622a09d4108cdf122faee703b4cb9c6615e4cc12afc1f7679. 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/QZDA81825741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02853b2d2ad7c11c2a44506a36304364666b990481ee82340fd0566916a42aa. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:11:41Z), 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/QZDA81829206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfce7d731598455bd08b960d75434577e0df2019bab814e450be28b5c750a332. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:28:10Z), 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/QZFYX1958260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeefd431623c887c7b990bad6be240056d6f01bf558ecf7549e8c10a04498c48. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZHNC2095019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf600d35565d033c7ccb04b82be460a3295cfecb9e9d1b6cdcb52d3f31a17f1c7. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/QZHNC2095020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31149e226c0d3b941b0e9629a4088ef8e46eea3b925d8ac80766b02cd4b75e28. 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/QT3F32424920.