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 0x3fe1c6cbf9e69caaa36d22215799c85dd47c94f6b4076b7721866cd23c67649b. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e71357c1-9e1a-4faa-b543-b696924d918b.json and https://artists.proofprofile.net/proofs/artist/e71357c1-9e1a-4faa-b543-b696924d918b.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 0x0b4bb9e26954aa526fcdeaec2a4e44d650c3d05bb87ef3939799194372cd0c5f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USYB32129301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd34d161f0cb3314750f87c366ea8de51c6f0f355e75b2555062341c13ecab8. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USYB32232401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b6b0b01fbb8b15803e13be95678b00fa37190d8d6b1b5214db0c91c018df51a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USYB32540611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd1c6ef5514c6738fb4176e5c8b44fdd01c0bc10bb7b9bf70889c00ca929886. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USYB32540601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d3169cecbb0e1aa30d166fa99ac9a63f64571789b32dc1da1cd7ebe08da706. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:58:09Z), 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/USYB32540602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x460add091896bc0b9c0bf2e4534f426854024bdda4ac64db17346f18ee2a5b4d. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USYB32540603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57935391d562929c150aa922edc22fa4a0c3dc032429023089f9e30b02b06ae. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USYB32540604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0949a9c3282f28954fde3676f32cc6f1f01034e17100ac52c70d0c4f7dd37379. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:51Z), 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/USYB32540605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53b40ea156edd150897b23fc6c13b8178b0a9f577b8b4db5e21df65315f3a1ef. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USYB32540607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49637e1fe5438f3a7398f179beb34edf0e7b5f91dd420154e7d3eb6323b35977. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T10:17:22Z), 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/USYB32540608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadd6ca8b9dd67b77bfc5937df4811bebf7e224a9032c6764179f2115d92d52b. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/USYB32540620.