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 0x70f643111e24b060e720ec2bab323090de127749763951c2b7e29980659d042b. 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/bc1cc149-38fc-4902-960c-2ce5ed0e4ffa.json and https://artists.proofprofile.net/proofs/artist/bc1cc149-38fc-4902-960c-2ce5ed0e4ffa.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 0xcc169e102d61f492db543dd9c6927653de87370f6b11d8752471c339e55dfa15. 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/MXUM62400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fc270256d9f9094900c27cc84e55545352bbe30ebf770db5516d8f4038e549. 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/QZTB42232519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4cd1e265c24b39556426cc70f92cf7f33ba7cc75a608d074111f0afe2990d2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/MXUM62400244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c66350e6c7a411671afcfc7d1dab00514559eadbdee293ddd5f4b42b61e4a2. 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/MXUM62300535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c7afc6359d8aac8f2ff7b7fc064b319ae5b452ae887eaccc454a7a85ef5bc4. 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/QZK6Q2388250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f171d08bc1594fffc6bd01218a984b219195a4a69937e50fd1d1622568fc4. 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/QZTB52256145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13b2a8fe77f38ae23d2bba375c4a4089ba69fdb130c993c619638ed48d6cf3f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZK6P2249234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc5490bd94bf29421e7898041da874542256ccfba9705bf998681b55f905e5d. 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/QZHN62248883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266fbf213072d82a6d2b97de3e84956cac983ab407d8ae6f52e947089b4eafa7. 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/QZES92284761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448f364c55a5acecbe053f741738d12676817d98d2fc1dfb6b5cf258ee13f7a4. 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/QZES62202444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dacd256e69119383fa26fe421cb0b8df8e88ca9ca20e5a61f93cba289bd30e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA72283942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf94280589c2f51aebfd1cddc72a6c7d7ea650dd2a13c2b913b5bf6b2290ee15. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:54:41Z), 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/QZDA42294614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e45f9b98c34686def4da209627670c41f4a1bcfdf448334b2c6e94262d9878. 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/QZFYZ2288596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d8e80e9a5247ae89552ed6478a48f749b5d588feec463de71f1ad85b64923. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZNWX2159831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06778ffde14f27f71809d0fb63b345687a3fa4802f10dc5d10c35099aa78ccfb. 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/QZNWV2137883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4369ad7d342fd1e08043c109f1bf61ab3e4ffe34444efb556f226fdcd8986149. 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/QZNWR2121035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751eec2152e1d0c71ffea12798883967c21d27dac49b0b66eee77c4203a7a485. 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/QZMEQ2110064.