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 0x6cbae28a235d947090cd3c89838a78d84c4f04158990072123829f048fc76571. 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/d8367294-3e51-46c6-bfa6-7bf00d3c69a1.json and https://artists.proofprofile.net/proofs/artist/d8367294-3e51-46c6-bfa6-7bf00d3c69a1.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 0x0a6e2e3232c1d65c17b0c7b6f0b544ec04fe83500ad2652e10bf4f0797ea04c9. 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/USHM92183827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1cb4faf174d8f1b6d2bb8495cabc8082e9291f1fd88c1bfe7b0dad86515d1d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:29:00Z), 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/USHM92183831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4bd70e27ad4d18a513c01b6e8c6023b6f90f6485c6b93b34038a75b097b226. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:41Z), 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/QMFMG1363664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfea8e653acdb3e87e19548e53aebda04e58740ad050828f1439265fd2b60a6dd. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:01:04Z), 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/QMFMG1363668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237558a00d8ff6a19d4de9d1259a339e26dcd9ce34f3d4303640463ebec80d4e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMFMG1363670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f2075d08452fdaa9ecd0a0a5632bcdf2c0c04b77a9b658f2ef8d1db01c03ada. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QMFMG1363764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b7394654848d86954e8a10db4b7e99a827a8434fb8acce36ff7b970edd5f5a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T18:19:18Z), 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/QMFMG1363868.