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 0xbc9ce088c9ae2f8ceb412778d434ef700400b7aed1dec5e313f86c6ed07f742f. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e28972de-f44d-4e4f-8870-13e6a5da0480.json and https://artists.proofprofile.net/proofs/artist/e28972de-f44d-4e4f-8870-13e6a5da0480.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 0xf0f1956ce8ab2553e12d34b794aa703f101ca94e8a715b7b8a36ee3a88c797a9. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/USHM22364483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f048f3ff8dc78c3587ec6ba4230316d175c70d29921f982ea6c6bd6bab9ab9. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZZ8B2410882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb83d3707c5266d1c082632d33967bb3813c32b6f8e9c3568dfa7928050445b79. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:09:32Z), 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/QZZ8B2410885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a692dfd6aa14dc6cfdf327456a3e041e0ad832c84fe942862e85b3635ae0d0. 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/QZZ8B2410895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179934d446149a9941816e7d4880f29ef41f02ed29f9b8e7420aff0e18209aa3. 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/QZZ8B2410896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84d243ff365db4c139451cd7183faf23f328f362c3c3bfc771dc3abb2d5f877. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZZ8B2410897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0abf31fc7e27b6f520b41559562bfdd1b99f84cee68527d4f4cf2404c23b08e. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:33:08Z), 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/QZZ8B2410898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179f3080abb7c13bb4c8260640cbf9df0db9857c7ba171f9be0ce1c9e34d30bf. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ8B2410899.