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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e8c88d86f0a53750b80e5e795a965b071e600f5bb64ab2b606bf9d178c1b1e. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46580765-9932-4031-96ef-5a06b1fe80e4.json and https://artists.proofprofile.net/proofs/artist/46580765-9932-4031-96ef-5a06b1fe80e4.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17065bf1ce8986c6bea2c49737d496a4eee0bd719dffe2803dbb6616969fb11. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZAKB2417398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe892804a74c1f0ee586bee3c428c839da5bb7007ed2244239897d8efe38a5552. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GX4R52278334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb0764386fca36185035d2a83b751ea28455dcfe7452701eadf94ab7b055171. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GX4R52245110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13848efca7891f99ab328e664d14058bf40f2da85e0ee452db4489378fc8ab87. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBSMU8510178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be37f836cbe1e20c812e2be2d88f4b1952b82a6e0ecf3d02dd65782dd69b9c4. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZFZ41939429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cb3a8be2531d7a5e4240f256549f900b5d967e59961510925979195b83f907. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFYY1992040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27128b8f7595e820fcfa1daa2b7462fdea6d19268b3bba9f57eb4f10546770d1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZES51928133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691e4e5bed55388228b2d777f6f127230bfc203e70c2452a83e7c38e72c53841. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ALA091800040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb238c8ce33f493b3a4983d7ca740ec36d80489adfb13150ab862f9c08eea6dd1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DETO41851505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x615ea084b14a137207cc672426d5186c7805c2624e29e23a19aec7ccfb68b2e4. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DETO41746971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598fe83531857dd56d13af8855ecdac6470855d76142e05ee40796ae4fc4e8b4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DETO41851033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f35d1a9122c353adb3e9f581338edb58d50bdc71cab32456987e6f9262c20be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DETO41710191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a6710871964acf707c72740ef17200a1da555c11ba2a81e139b3882819d37e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DETO41625396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ae2a1c08215ac84c21f7a4053acec50deb5ba9a7c41b704bf4f0c416c6af56. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DETO41683131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc65566ac3798c7e771ec1edc26ee1c41f2d3a3ddec8446d0413663b9108542. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ALA091600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb5d842126b022448a4598fe3e9180e44cee149ac443b16d3680e9aa64770df. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZAKB2336910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17065bf1ce8986c6bea2c49737d496a4eee0bd719dffe2803dbb6616969fb11. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZAKB2417398.