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 0x215819500892d908846cac57d039ceaf4face8ebf6723dd9366d436a87d0938a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/48e405e5-d508-4ff9-a351-dcb9f38efb07.json and https://artists.proofprofile.net/proofs/artist/48e405e5-d508-4ff9-a351-dcb9f38efb07.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 0xb61788a6c8bb31169143fb30976b42ac463400b4e89a51d8935fd87144068db0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TR4351200157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6148a6039e938e8fade475f7a2b7c490ad33f424adf0fe17572d2c697beba4a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/TR4351200163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2bd847ceaad17b3391d8b5539f5b2e59e7fa8436a0161beca92f3489912627. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TR4351200162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c6226a87fa43387f425f2cc94cc84c6b39542fce69aa09da3c97cafc9d54aa. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:49:27Z), 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/TR4351200165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7887f19326456b920a28a441ed27fc4ff0887145c84315017091f5a3b1f96b8e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:48:12Z), 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/QZZ762504610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49de289ec9c76a6f69f2b0722a8b99bbae05bcf79ecef9add916fa1b4523dbdb. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:31Z), 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/TR0061400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe649b0c7f8cbc27ba1055da4b153ddc43356b6d9731ecd91c5508a3aa8539a17. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ7L2515190.