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 0x24fce7d90a9a73723c13d810bcc06e63a1aceab6e789d3956a42d512d940da88. 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/c7873fdc-23c3-4600-9d8f-314d5521d09f.json and https://artists.proofprofile.net/proofs/artist/c7873fdc-23c3-4600-9d8f-314d5521d09f.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 0xb7c26ec358a3a57bf0e86ef455f12917c7a2491f64bea1938438217352d86cb1. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:06:10Z), 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/TCAHU2471874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8825d0b0a0307bb4c8e2294122872e821bba3082b53c0044e4ac08174b43b81. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:43:50Z), 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/TCAHZ2427331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f7cf82f7fc4baa018f5d10b6e963e70fc7c38cd385f2665a2042021ec79a50. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:33:49Z), 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/TCAIF2491849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17e745f0c2f02aa59dcb49d3d06a5fb683c1fd06d7fc19f1c0aad3e285bb97de. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAIM2477732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57629c6bad988ede4a41661ac6e85f3a7ea9b12e3f038ae1123cca3f050921b. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCAIM2477740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee20e04a2ba9b8d5744d56145654b4f90e25e0c3ce4b096991cc59f2424e4a5b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAIS2418329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb185f44ec28f44d10f47c195e58ab0c9e95bdd7de7e2e6bc11cdf8753c083484. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIS2418355.
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