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 0x9b1ee34b5b88229c2f2d18a4bb1801ae819958fbf1b75379c178b2f37f3a274f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbaa6b27-af1e-41aa-851a-f9d490371456.json and https://artists.proofprofile.net/proofs/artist/dbaa6b27-af1e-41aa-851a-f9d490371456.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 0xac3338787b1cfff61ecfebac25a779819807b13f1b94339bff98bbe796827624. 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/QZW9M2270386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2052116445f0425d78afc2c07f9a185cf1428bfd025c19d25c07f74e622e7a9. 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/QZ5AB2342698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff93833cf2c4c588af21e412f8285e8650de56ae4c1f3ecd5145a0962554cc4. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/QZNJY2341597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149338c847d08bb6a8cff2c1a0158e638867ea734c01e3ea4622d01f5fcd1b3c. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/AEA0Q2399130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6ce8d1541f86b337d06ce79eb268d5d49a60258de763d839896ec23ea48afc. 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/QZZEB2390383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149338c847d08bb6a8cff2c1a0158e638867ea734c01e3ea4622d01f5fcd1b3c. 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/AEA0Q2399130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b3d536ec7aca960568c07ed997c82f55896f98ad7584c7be9b416d09fe21d4. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/AEA2W2409370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b49c91c0d4a14737bbb85fcc4211fb9fd2a26e593afe6731e4a4a89156968e. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/AEA2W2532393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a677bfecf2c70d366a74904c08b0c52496812e893b8970c7231c4c515aa6706. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/AEA2W2539671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2507cf9b33e5ed9605f87575bcb12930d40d5fc9e0abb4fcfd14bf6fd6160ac. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:44Z), 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/TJA012500121.