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 0xacdfe21a97c9d27ccf29cad7b8d9f0fbe729bc76e8f1185bfab8328fc43fc3bf. 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/1ef638f4-0164-40de-9ae3-c17497841b96.json and https://artists.proofprofile.net/proofs/artist/1ef638f4-0164-40de-9ae3-c17497841b96.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 0x12f5d3f680b5075fb15d9d8100add6dc06c689d1663794d42e0177a03a40722f. 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/DEBY71300574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98b02925987bd94cb780e02eefcfed8b325ab6aef54fbced6c1118c1ae20610. 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/DEBY71300575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88845ca009902d54ce62ea6c890213ecdcc9c4bbbc02e1329b97f9327b73f13c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ52121114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1c432c3bd3a4d22a97f754cf26c0edb99685869d9bdb097dd692ab3c33d7ef. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:00Z), 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/QZHNB2206726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bc1a38d73c0b88c48b7ec0fe515c807a3770827d9b5faef1a2b2abc2e25693. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:09:17Z), 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/QZTB82213124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1394ede501ca080decc9d8d9fbc87df941c74d8423f073bc37a2fdea457c37. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:42:40Z), 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/QZK6N2370641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25be47d574cd40f98f894d93bcda72948f85b393a14d91cbb9ff9226ec10aca. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA52493871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38048adba3f8216f9d445ac650b356bfa8c64ecd3e2ca9dbb970c962614369be. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFN2387277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75000276fe3563372a34d5feb501d4bcdd56c0c36822991c1ff41a733a554542. 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/QZFZ22543413.