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 0xda37f13931fa8cac42417b3dd8364bfa2404c50036327db4f0f0506bdd96921d. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c8ee2a89-91a0-4e45-af1f-3227d269f933.json and https://artists.proofprofile.net/proofs/artist/c8ee2a89-91a0-4e45-af1f-3227d269f933.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 0x69ad27f61ba8d523571aeef6a8d8c8ae8d762cddc5852f8d14b062ca81758da4. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6F2490331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb366dc4851f63bc7d08f18b794bf380d3fcea9f0a405093f5e8163ac7f19bf9. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZMEN2471467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb003efa17d1ffa8bbd6d06793e3869c9bd3e11d284f44e9b5a9ce13b5a5bd467. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:56:18Z), 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/QZMEN2484187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe81d0e79f0128206ed31e55b45197efd76d01d497d8768fa958032de4738551. 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/QZMEN2484188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa55f4338d491faf87849709e237f263013e8e9b317a93b77519017ee8e46d7. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:16:43Z), 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/QZMEN2484189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6510b17c2d3deeac5acc2df9f1ef62d3768547a7f578b5bd351b114fb8b886f4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEN2483468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a88c6abeaa17f7f4f5414d18517666a0b92b6ceeafd5aa5b3e754925d86123. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:57:11Z), 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/QZK6L2509951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3922b8648c96c9667d9c21c4964c7533a934b28de733682e2dc45aa41c66fc. 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/QZK6L2509952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9674907e307a9516274d5d8f10267fa97349e5f90d386d6aca7ecfd7e71ec9a2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6J2474518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x645fea4c370462e4ce5964c666406b452e2107296dad1c519d6b3b419000311a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMEN2483245.