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 0xcdc862b034a5a3eadd4dfd8cad45c8d02db7d4eb4a92e2fadcdf2fba56b5250d. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/41e9561a-7b3d-426a-a2a4-57ed30a3bba6.json and https://artists.proofprofile.net/proofs/artist/41e9561a-7b3d-426a-a2a4-57ed30a3bba6.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 0x21c25888f118a0070e3db62b2a0fa69e395e34e8399f6c7e1d87b3fe9dfdd404. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:04:50Z), 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/NLE870911903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf103378b2fe1d9dc4130c0df617a289e21fdd9e9f2cac2e88250649a096a81cd. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:57:00Z), 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/NLE870911910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acc16b109fbac257928d44231993e7c95e95f51ce19b5846b9edcee34d876a8. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/NLE870911913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582426ed043c50e20be954f7acfe7b3a449ac3cc4f1da6285f2ff64a345f8338. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/NLE870911915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c23f432b26fe7a796aa299fd0b5dd95f4f76fc4275e14c25889176aedba479. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:18Z), 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/NLE870911916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f70193bc18f9e77e51c0c982c7a431a7e17e88c37f64e959f3135fde7f96df3. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:04Z), 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/NLE870911924.