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 0x2ce44b0ce609906d91e1b72abe581bb7f46c953ff298c64f412936dd0b7b62be. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65e46ea4-4d79-4495-8b7f-7f72b905d970.json and https://artists.proofprofile.net/proofs/artist/65e46ea4-4d79-4495-8b7f-7f72b905d970.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 0x77e0377d3e5a67835ce4929930ed7c488bf5ee626f8b5c50ab08c7596b6955f3. 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/USHM21266538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5dd9aef21fa6e1340251d4ba826ae79fefa74bfa30b06d5474f1e66a6b7df5f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/USHM21266542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31935cd689ba030565acb5fe2db76328bf76d4ae60a41a2db695706a50654d05. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:47:48Z), 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/USHM21266543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8749e2d44eed877ad08de4c8bc1ffd429d23cd57b2dfb93a24f1252aee674d0c. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:45:39Z), 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/USHM21266544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467241f7f4ac1694d2356c2ec4a8ffb1b1a044520f27d6bc2281df43d644521f. 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/USHM21266550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7373248b8f1945ca102fbde665abd4a99be8c6dd125c61cfd6eb17a5a98dc7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US6860500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8199b586d554a8d48c7d2faeab2217fac5ebc778569a26b2a85de9349c2cf95a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:48:59Z), 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/US6860500242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c225b33ed9b55277eae3cbfc4174f1a95c3f253ab1b31a41ed9efee032fd006. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/US6860500245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bb085eca6b4b155e56637710f9d1799f35fd9baee836a453c5cf331991c70e. 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/US6860500250.