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 0xeed667f46d9a07d5cbca41e2b3aa9721823428f148c4733ea93bc47c4febc984. 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/d549a0eb-f858-41e7-b46b-19e4d145997a.json and https://artists.proofprofile.net/proofs/artist/d549a0eb-f858-41e7-b46b-19e4d145997a.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 0xdaf58ccbb5943801d042e7e6adaaffe669a2b394aee5c1e75d1298e7849aa3e9. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:49:29Z), 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/SE6SA2011059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06026c023990357b26e6440e19f0fcd1f8d7ce386225441ee4024c69b617372. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SE5BU2126257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878b735f500c6ab0801a4a517e9748afd5c798cdd897967d67c26ee6b38e7040. 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/SE5BU2126258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2b7d21bbb7dc4b0d3ac7763ee3c55f71d47ccb94d5d14fb992dedb367e86cb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-20T00:00:28Z), 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/SE5BU2126259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dc4179ca915e6aa20d6aabab3cf85ebe2d375badad111f13dd91023109400a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE5BU2126263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb36cebee7ce947c7350403fd9269d3822070d7fa0f4effd9ebe7b1c3eee93591. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6QE2062190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7657c5d169be9d7b39f6e587a177fac8fb6f5c610c9b0ff391d679e7fcec9cb. 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/SE6QE2130187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd429176d76908d27e42b58441a8cdb8dc617282f206a82763f7b30cf111be731. 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/SE6QE2062188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ab8f2fd415ab373558fb32ffafbfb9965072405685a86b16863b90b4310255. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:17:52Z), 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/SE6XX2275812.
Popurri - Yoel en el cielo, Mi bella españa (Hermanos Castillo)