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 0x527988dc287c3893661dbb7564bc859dd6a786af9161029a978e29d5ec3bbd71. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/669d7c66-8296-4d75-8616-d00466026d7a.json and https://artists.proofprofile.net/proofs/artist/669d7c66-8296-4d75-8616-d00466026d7a.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 0x6786f77189c44f6c798d3e5afa096ec290cd96c79e0cdf2d3dfa46b89eb15ed0. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:41:22Z), 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/USHM81886217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03e101cc0ad42dadfc628b845780caf6192b031d2c1f7b95bb43475b51b5d99. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM81886221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6676370a8490e03841e35e9d30660cdab3186ed30058f34c54d8b1dff42f5f05. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/USHM81886226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb8cbcee930d4043eda0171c1b9cc7fee42d44fb8424694c8224eeb05130c1b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USHM81886230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5713d3c1f9bde10a3219aa94f49d9f8e4c684644bfb6a7e2fc36660a1ebb50. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:52:34Z), 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/USHM81886234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8db09db7bc2a8976d43dff5369aa684a0d496babaa4ca6a60a2c585d5c08d9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USHM81886235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a7c1a5b1c6cc4b119c70e253c3c05833ab33ecbf44492c66142fcf2755f39d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM81886238.
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