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 0x54ea176bc61ac1373c71a75157cb7c75b09bd3c886a5306274fb86a7245b5dbf. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/56033d30-d394-4ca6-b705-35d4c43dbdbb.json and https://artists.proofprofile.net/proofs/artist/56033d30-d394-4ca6-b705-35d4c43dbdbb.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 0x3760f79278ed6d20f4d8b33c07d8b2277c553fc2a1fdd331ff1d9725dfb6cf62. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR2061709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38c089f7b58c503554438f3fad104c02971f615a878b4de10074e074a1bc6b5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2063545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf012722af819611e6c78c628edccbc49ac08a2a07f393733fd9c98c26ac48ec4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2003367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccb2e9f92aa16285726be02362e6ee254b877f20d8e5ed20936bb68262d66a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBKQU2053696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec647ec488407d814beb5d9213d1890d9767150c791182e302a52bb208650c9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2053698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef81c1876ff240ba3abde0672a748e4ca4dea805a433f7a69d9db6d64ab041b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2053701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5582eff1fdc7a22178e3040643d9465e95a2bdd24a9fa21b523f0cf16c911ac8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2053710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15566629883cf6442492bab490aa00f6eca2bfd9c4f708aae1beaad4f011d22d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBKQU2053714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b116b1fded755406291708d2693a87cc5a3f5e8549bbfca360fd120afedaa9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CA5KR2118145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fda692447200d39b681e0cec518f9efba2174af1f8829711f0653254b2b21c. 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/CA5KR2118156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2537b7254caa97f854c1aef254b9997ee2b259964dc6cc3054bf6fa0617d495. 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/CA5KR2118166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90e9952904fcbb83bbc10f618fcd27b42cede5c20f537dc0be577253c38594f2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2111016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f4aaa49bb9cd43cb867748c31275d1201e95a55a680902ad64ee2be420443c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBKQU2111019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e00a6f210cb03c65afe0b22103f84a1c49605628bce25e84cda966b4954591. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBLV62039511.