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 0x9f4c85bfda1d0acae02300966db12347b7eb2c09ee49b69463fa8de76345481e. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdae3a82-1025-48bb-ad31-bdf863d99e1c.json and https://artists.proofprofile.net/proofs/artist/fdae3a82-1025-48bb-ad31-bdf863d99e1c.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 0xfa946d26e4b6842e7fb0edae33d3d6472491f6d316d0bccbc1172b116b81269f. 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/QZTAX2336356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c75944bfe665bb7f0aeff1f9b18f295bc9799d7338d04f9e0d64437cd30a1b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:50:28Z), 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/QZTAX2336358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d7590e98be0387dff74d4c79bcc5dc220fa6bcad274b0da0fea81a95a093a8. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/QZNWV2383363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29335c2cdffacaae5bea666dfa31fe9db69fe2be2b93508a3035ff1d6ae76691. 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/QZTAX2336359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe629dca14e5ac9bd651fe71e42962a48e12df893fd63e3a54d35bd9f87fa08d4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZPLS2331791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b98cbd873fd7405fa7ea7e2e2dc8f3295572eb13b9c6d76ca93e6ed05f7e09. 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/QZK6N2455561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45787a63a3d615446697a77e869fb14add8585627158cc0524e0f0a4a131e3ec. 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/QZHN72429621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9460c2de951ae6d02dc53af0acf743282e68cb32c2fb875f998eb199031139ec. 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/QZK6N2455562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb77719c71ef7e2ace94927619450638bbc994ff5a51acebad693cc445b6c43. 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/QZES62462834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45787a63a3d615446697a77e869fb14add8585627158cc0524e0f0a4a131e3ec. 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/QZHN72429621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb77719c71ef7e2ace94927619450638bbc994ff5a51acebad693cc445b6c43. 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/QZES62462834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb77719c71ef7e2ace94927619450638bbc994ff5a51acebad693cc445b6c43. 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/QZES62462834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe629dca14e5ac9bd651fe71e42962a48e12df893fd63e3a54d35bd9f87fa08d4. 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/QZPLS2331791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d7590e98be0387dff74d4c79bcc5dc220fa6bcad274b0da0fea81a95a093a8. 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/QZNWV2383363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58c8389fc2bbf5bb277aeba2bc3f972e15a75d9eb8c08559c7cdc86730edca7. 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/QZDA42202088.