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 0x2424d996caae863034dfe3b822f82243e2d0ce4b523d226be3d33e18272d7a22. 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/479343bd-208e-4eb4-b3b9-d915be6ade37.json and https://artists.proofprofile.net/proofs/artist/479343bd-208e-4eb4-b3b9-d915be6ade37.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 0x78f042df54e4a99271eaa9d02efd3a95ce478a226f2ea0e7073ee05997baa304. 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/UGA2F2400088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563d91173490ad34edd78d9cd7e067f9ce273887fdb68443adcc134077e30871. 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/QZPLR2372153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac8b949cef930dd3d366f97e6c4f7f5f2486879d9a792fe4e8b0cfa094140a28. 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/QZES72475351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb695347b6aa35f878e086aebbe13cabdeb8a5af38ef21a6e375038cc234cc50. 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/QZFYX2494537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef82ef1387fc3a0aefed6b80a3a1e187e07cd8d3df408776d11e1d2f31b52ae. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAY2330456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25c9be05ce3c4ea1f53c13fea47b3e12b0c3de11ea1836e03d4c50d668dbe0b. 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/QZK6G2300678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bed414b6f840f3e0aedcc6961bd6eaeb244dc0b1059228845643d07b919bf19. 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/QZDA52318598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8cf1082e84ef9c19894cdbc310b73c67cb7722543c898d9580bc4d3655ae607. 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/QZNJW2436094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce199a84c67a43dbca903c8c6fc6c614cd175734461c74b7510777dcdc7d212. 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/QZFZ42330790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e2930d2ef2101291e2e1eeb532097e4d44eae6131066bb7b54658911ec83968. 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/QZNWT2251392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab7b9a6b6b01b01101dd09fd724e231b83177dc50ff879e12a085248dca92b1. 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/QZNWR2281939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f70a93e74feae2a91b138059651d9595509579921637219b7e7ae17147498b. 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/QZNWU2103948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebec7dc117c950ddc56e02e7a5044bd74fb9700e10eab072416ca5156c6b406. 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/QZS7J2319757.