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 0x271be2771d82de568ebcd813fa42b3b9dcd86a354d8a12c034a07f0c6a5a1eaa. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8157dd4f-c844-4eff-a23d-12ed86a95582.json and https://artists.proofprofile.net/proofs/artist/8157dd4f-c844-4eff-a23d-12ed86a95582.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 0x3fe233017055b9a029970e11265ce6e75f13a2cf0d7b7323161220d391a23afd. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USDY42362339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154734e5e0a963161a02077936e8cba9e6003dfcb75bd43e5771d9356a80bfdc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:17:24Z), 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/USCGJ2415578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c42c8fecd942abf8b470141a94313c534247c28f6827d840829ab00c74eb103. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T15:16:19Z), 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/USCGJ2415579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe233017055b9a029970e11265ce6e75f13a2cf0d7b7323161220d391a23afd. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/USDY42362339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb003b9393ececfc26af37258f7b801953e700ed2b9fa30b7c11b5edc34aaa75. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ2415580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612c07cc27d19265188f8a3272fa0c3726d11ff7cb1debd01953f4daffbaf6ae. 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/QZLL92544962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb903c84a5eafb01139f7d2820bc4517289bf8a24f5f716e63185c7630cc32a68. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USHM22515815.