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 0x1f06c094b6161b9e5f3342d9a997db308a6ac8200ff6d2b4feb42cca065cfbae. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3d0a4762-1a08-4d25-9c23-81fda328fb47.json and https://artists.proofprofile.net/proofs/artist/3d0a4762-1a08-4d25-9c23-81fda328fb47.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 0xa529f5a77651b664de15b0676be79b51b2f1034bd5846e24bf58f0093efd934b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QMFME2156452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce7fc1b1ce9dec643f83c4db5a878613778571a1f6877a8a03e760caaf7ca2e. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QMFME2156456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x292de15364ec475ec685230242b6eb97fb36da842f21b3865cdf3cbfa7733161. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM4TX2397235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7416dfa137c227155988e40fad922b4f85ca0768f4b074a900aea972114550a3. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:45:25Z), 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/QM4TX2397237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cd6187381411cf97f38bc1a70124af98e4dda51a2f6f9c223e654328fd0a12. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QM4TX2397238.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed99b5f2a45bd2e6eb01b049df51ae17a1e129bd26bf5d7eb14d8b6f2b03913d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM4TX2397240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c21401fb6e2a42635313dac2cfe3b403b94af903cc9ddb45c4c95c6e02f415. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM4TX2397241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fac47effccaf451508d7adf3c11110e73fc99e8608e793cb5ff2ba8a30438c. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:29:56Z), 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/US3DF2500298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfda9509913857fb65c0aefc1316f4e0a68d999fcc4772916ddd4e4ff7c11597. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:02:54Z), 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/USA2P2516827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e40f03514c5bcf45f2fc6ec6053243288771014e89e9a5b171f0d03fd08cf1. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USA2P2529363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9353c6dbfd6a4c1b1eaef3d1b41e0891d659fc652dd36f1efd153bc81592d760. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/USA2P2531046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30798eb3cc6a3ac2a5de2527b67fbe96ea8218b72ea5de259b7bbd8ff905c75. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2429209.