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 0x3a5fbd6c847fca2e7a5f45410f34c3a235fb41557d124da8f7b630ad3d8f3542. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d21476d-13f5-469c-9404-52f3a2c361d5.json and https://artists.proofprofile.net/proofs/artist/1d21476d-13f5-469c-9404-52f3a2c361d5.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 0xc3db18ba3c71c12794c8adddf3009cc6e72c23494a75e21586e373cbcc00d9a1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:56:45Z), 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/COF019804841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87cd9217d105558514c6c6b39e8587f3798bd4c2fbc917c3949dc96ad84730e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/COF019804847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb2b7684cfdc6bdb11a7e8ae44dd066882393711af6478cf37bb9f6419b6b73. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:06:38Z), 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/COF019804845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8663217b8459adf75be22c963f1b04d3e8b4802c7e83a82c5483bed36ea40da. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/COF019804831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed356ec8a2450d68280a988b649a0b4767c864567d8dc95774ddbb389a2deb21. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/COF018300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54fe87a95b5a0a1298afcd74f705fa42e09e449cbe1735c61ca4d161228dd9. 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/COF019804828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c3dd70c2158e1041b125be6f55496aaa8e17fd3f70f5af26df2fad5f8ae9082. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/COF019804825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74611d83a08c2b1c060fa478d084b69e5641292f6dde118f3345898b9087449. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/COF018500062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f78be25b2758cff4d1815f9138033c9cb6e6a98c791a0d83d00de3142e672c2. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/COF018200073.