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 0xd94215e4df3a1593a29205b990cc18a37221f4fcaf7373ddc6d10fdf2f67f0f2. 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/532fea62-f12d-488f-ad8d-70cbd1c9ac0e.json and https://artists.proofprofile.net/proofs/artist/532fea62-f12d-488f-ad8d-70cbd1c9ac0e.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 0x36e4afdfa1cc01e506899638672a03989b216927b54b2d57993c33790a593a25. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZDA41886453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1a333ddbd7c8b7e191397d3cbebbad691627e66cdc0102b933447966b3eba25. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:29:59Z), 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/QM2PV1890841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7f00c7f9a2b14207494710afbb4ed47a522272e53693cacff6c0f413967c79. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZFZ52010812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf53040425083c3c0bacd3f67c6ef268ea8ecacbba93ee66839af4730e1d3d1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ62003958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0264bff7a060a1c4e4d9923a8b3f87e51c453c194472093ea3c9f2fe85a9d539. 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/QZFZ62075756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad82738ae027fa123115915663d6b6ce38fa1fe77f4b109ea3701d4be38c133. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZDA72088206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc947e23e89b69bdc9462ecb9393720f3fbe3ad7447486f0d10a96785c0128cd. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:10:20Z), 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/QZHN42033505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdedeeb8b477b105849d7425a87025cdba1818a44c76cc02a0422ff287ef117. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/QZHN72036699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9511820b20c765ce49e1d435c7962b83c4159018435ff2d5f53a7f4078dd0d7. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZK6H2085416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9efb86da22e76b1a80e7f5165909b37148dbd5a14545dc70f42ef580c98fb70f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA2P2035215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3b0a8c48782ab897f42bfab92377dea7390d525f8f7c4e4c0126a11af4a3fb. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:26Z), 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/CAQOI2303198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a861a00463c2520974b7d1cf2c575b943934a204a9521190b9539e03a369b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:30:50Z), 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/QT3EZ2505444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8341b154bb09827f2ca6279edb55b1bfc0260779be358f55b2a478849978233. 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/QZES91966361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e39e5a4c5b14ce111ad7acb75ec6b3d475315f24b95f12ebd43bdc4b097e30. 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/QZJL41900110.