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 0xcc2b457decf84a55a698c81ceee6c6938a29111d8e52567e52cd7051151daf4e. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da8d5143-ac1b-48e2-9f88-bbe8672c79fa.json and https://artists.proofprofile.net/proofs/artist/da8d5143-ac1b-48e2-9f88-bbe8672c79fa.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 0xf5c442acf79b56fa74cac3f5ee197eca341fbcc4a5c1b029eda1453297c4978a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZW9M2222675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c977bb6f9c41f5269beb96703ec12057d0ba99fa5c1af50d3fc3394106dea0. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:58:11Z), 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/QZW9M2222676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff90f1b63a9b77ea09c4a48cf85ec2335d5e606aba538c023492668e6ed71e0c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZW9M2222677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785665014a2d5cb295e2b37bd7501ffc8d9285e9355114b9da35507e590080c0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZW9M2222678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44faf5b1f32f1ce2c29e2945e5ba35d6ebf0445b384b9d753b81c19b6f0cf287. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:46:47Z), 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/QZW9M2222679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac87c494a08440e8d89fbb00f80db1f4e359d9bf0e477b9e2df679e786540d8. 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/QZW9M2222680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8526770121d976f309d1076aa1bcb8ba8146ba5090f4ab3f93f554b04f2c252. 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/QZW9M2222681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ece223c05ba5e6ac2e9f85e138923f576485596ad931836589950cd5bb133a2. 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/QZW9M2222682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0356cb84b42bd5262835a1ebf8a9bfeb232198f9eea8ef1a70eb2e5893dad3. 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/QZW9M2222683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f826bbb0072920217bf2e15e47a91e8676afd76ec20db52aa41111ebf0c7c92. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:04:40Z), 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/QZW9M2222684.