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 0xaef1b6fff04e3fa8f195355a71139699f3e66f1ae2922f88d0dc8b55d0fa9e66. 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/c5c8f3f5-b971-4dd8-a947-b11dcc999545.json and https://artists.proofprofile.net/proofs/artist/c5c8f3f5-b971-4dd8-a947-b11dcc999545.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 0xc31074672c3716fb2e7dd24beb379be80d08af14a63279c778a67a55d9bd1661. 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/SE5IB1800445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25a9c883e8129c2562db64cc5617f22130684b992aa2e76e3b81c77e114e039. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SE5IB1900724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda6d4432d31acd8f10773715e89c36b5ab76bb8d6f336466cd45c17dcd7e582. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:01:01Z), 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/SE5IB2002004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58fa6ed6b31908c2637ac4cff8527b0fd1f629c3f3bb35b227678328c84f0dd1. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:24:52Z), 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/SE5IB2002494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271150de48b7293f5d45660e8470a0f19b83db338411effc8d86fdf6ca084230. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/SE5IB2139664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c99b7ec0a04233d56d718be571a0be0d351ca9feed0e8f163cc04f30fd75066. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/SE5IB2309737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda95ee123b2ff2edd19e2fbb0104e5f2a4ba218489320da8bce13da015b09d83. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/SE69Z2444735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51677c25591e276b4e8421d96900c2f04ef3331c412b42b90bac4452c0d2561c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE5IB1800291.