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 0x0b4fc8a7f880b5702e37e9832d0096a568846a07b05cdfc063aca668a5ad40f7. 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/69d1d815-7d43-470f-ae95-4c4ed399a961.json and https://artists.proofprofile.net/proofs/artist/69d1d815-7d43-470f-ae95-4c4ed399a961.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 0x6de01ab1e9f4e4ea14393b2d980a1cfaabb37780ff4c8464c2952381d380602d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2Z2001066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db5717ad00141c19a724f072cb073c31a96d03e3281f54bf1ad6391162e9e3e. 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/USA2Z2001067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62cd7b238b0eff45ccc4ba4afae75826652c09df4a3c5832c5f764b6bba9e5a. 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/USA2Z2001068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e498693787900c4c7442e3c71c48a5c71de0556c4b3f8272e9e4ad79fad0d94. 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/USA2Z2001070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9442e2e58b0cbfb3cccf8e9d756bff357f4a236c0efb42f2f2ab9278108091b. 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/USA2Z2001071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5cad85f38727d3f9c4957b927cb78d03319908ac176d2ea1691e01af987c3e2. 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/USA2Z2001072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d7f34ddd7d6cee7d3588c06dcf98d98e8a3afd14aa5091d3600a1909831208. 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/USA2Z2001074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e96be20e1e6c543232958cf123ba7935e531e49a5cf206c23b2c736692d07e. 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/USA2Z1510921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e73091694b98ab860515fcbbf1b273349f23e8dc83b32f49e70cba55164da4. 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/USA2Z1510922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x573359a2dbff9d3c47e56eec0ad90c1b512dc7f55e4bde9d132d0a8e6e71164b. 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/USA2Z1510923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160085133bbed9d564c8e5c1046d602ca3bd7c3519f30b6e9e048c2a36ea36ef. 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/USA2Z1510924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d7c7791c3c394f7bead015ff0f6ffc69a4a57040a1391e42efe237f6e607ab. 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/USA2Z1510925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4ca5693dcb85e3ef567238b5786d0c58959c8bb416463437529f772fef6456. 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/USA2Z1510926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9cf39b49449b6426eb397d281424ebf2117b3791ebc109e6e3b0f7b295e6ab. 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/USA2Z1510927.
Choir of Assholes / You Think It'll Make You Happy but It Won't
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de01ab1e9f4e4ea14393b2d980a1cfaabb37780ff4c8464c2952381d380602d. 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/USA2Z2001066.