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 0x06036eaeffb9b736459f6a0671b40d5a8ec14e92a0202d707fab4c80050142c8. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8ff292b-5065-4612-b6c5-d484e9090de1.json and https://artists.proofprofile.net/proofs/artist/e8ff292b-5065-4612-b6c5-d484e9090de1.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 0x6749d8e939c28328583c1fcab383db55434ac6ba12c2696a47a46f56803e17f1. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:50Z), 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/USHM82404561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfbe24d153faeb8f46fa43c2be34c1fafb9ec158448be18d36364184ef52f53. 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/USHM82404563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44dd79dd6faa8a8b593e408a1fadda223e5217b2e8cc95eeaa8dca5bf09270c4. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/USHM82404565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdf11f5c120cf6d691f4affee6131e63fd8c7d09ea7590107d03401377007f1. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:47:20Z), 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/USHM82404567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595af2e12a3fb630368c60afa3990be7c79b203fb9f0ed9e83a27919668dedb0. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:34:14Z), 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/USHM82404570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853fc147776bb3f0d20312ec03e031f002e0024059442e7d218a18c427e5c1de. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/USHM82404571.