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 0x62cd929bbd557bdb3ef14feb4eb62634656d4f9e496b659e016de4b517242b67. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/07e2e389-d8dc-4c67-bd71-9d02df73a86b.json and https://artists.proofprofile.net/proofs/artist/07e2e389-d8dc-4c67-bd71-9d02df73a86b.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 0xdf4b1fab31e8b527644ee0c28fbeda292a423ff2a6d69729846f0079a7b6a68e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZAPG1731347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf789e86963b25c05dfe8c886a458821b2169240bd0aed4e6bb164dd7d6699c79. 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/QZAPG1731349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bcc43d2af098b1e4dfd887cb7a0384e2eb6fea5503c77abd808cda9882eb71d. 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/QZAPG1731352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3be8df61fb7e02c129806bb0c02de76df50e3b8472ec1e5aa484a75a7f9ace90. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZAPG1731345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934b2b0a906ffbab9199bf7d8fadca2ff3a44aada7debd44fbbb47df5e50e248. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZAPG1731346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76de78812afa53c12e24f345576f99975ea8f8861569dfb2f43b28b46284520. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZAPG1731348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb212c5ef4634183437da8063e2aedcfde9cc1c7f84afc028cd4da71913c38a1b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZAPG1731350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c273eaf6549f5773350f2458f2ec2d56d59496f4b1981502be4a24d85bb28e1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZAPG1731351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3faed8546964c6de7e40fd27e864200ece1f5803816b309c18ebaf2b637235. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZAPG1731353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04feaea338a7d83dc84bc26037fd38a3d652ccbe087bf6377167250a6771d42b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYZ2393726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bb2dec9bea07ef4a7d242d8b3f4e4b77ec5c20aecf349350cca0ad1709bd07. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZK6M2160063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e3720e84cfc48e985852676dd5e754ec728ce3a8945376d3b515eeec580ab7. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZTB32285636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x361a63827d95cbf76267e0c0ef9faaafcd107cdeb650e3fc00aebf42801c5388. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZFYZ2393727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637a27d8d16e1c5a4f5673317083c4e79f95f5d9e0573e911b648597d47754ce. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZFYZ2393728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34af3255021ea755729fd871503ec57b384fc79f148337c676526794e37b271. 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/QZ8LD1983361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba4ad4aed1a3e582ed2f9cd3c233b19996d70eb29e4f64deaf1db8a90df8600. 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/QZ4JJ1937515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321e07afb2b30519479cd12f39708845ace7966a189aae8517f217bc80715fb9. 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/QZES81836688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eda14084ea7f4791fd0ca8a38a933fdf58daffa53ade43c41c4fc0de8a4f1ab. 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/QZFZ62508433.