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 0x700a40b4849b50178a8b199886ebcce81d0e01b9801e81f1d72ad199a70eb5bd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62cd3ad7-5e50-41bb-a236-2601cd693244.json and https://artists.proofprofile.net/proofs/artist/62cd3ad7-5e50-41bb-a236-2601cd693244.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 0x6a18bbb1424cc57f9d8aacd697dd3c258bf0618461a8dd0cced73786b41c5bd7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/DEZC62350265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8194e4e2bebd51e5f522335b513598f0f2e575365d1e916809f040a141823391. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEZC62438452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b2c2273a6d5e16d79a1b94f66573ce3444f398216a55696f81878598c7b881. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/DEZC62443138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48da989d4fbf5e9c390fe32e4eccb4552413992923d51ff3a44210a028ce29fc. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZC62463554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8194e4e2bebd51e5f522335b513598f0f2e575365d1e916809f040a141823391. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEZC62438452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa818b510be81e52cc15113b6834f7850bba90a691248b7089440e03e7d80407c. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/DEZC62450620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d7076efa44eaa81eae5646d6d443848483ef99575479fe028ee90e068508a0. 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/DEZC62589705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a18bbb1424cc57f9d8aacd697dd3c258bf0618461a8dd0cced73786b41c5bd7. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:06:05Z), 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/DEZC62350265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81648ca31f7526700875cbca4f4c03af435dc4432b009e71237561514d1a82c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DEZC62454782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103bbfe526568f3dcec86d049985c362216ac8ce19cd0c02ca3af07fbdd5e798. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEZC62454779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5008254bed227c6af100b8536a4ed7f4bacb338024cbf31f018a7c4bebd2ca16. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEZC62468280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f51defdf2444fce2a5e5e2e790e80033eda66c495e92c92e6b56b59b70b881f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:18:12Z), 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/DEZC62432232.