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 0xf7f5dd3020f1dece4e08d4700fad910417adb2b0cbed1e2fc7433e4b3564f4de. 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/7e0ddb9f-5b23-4e9e-82b8-019053c54195.json and https://artists.proofprofile.net/proofs/artist/7e0ddb9f-5b23-4e9e-82b8-019053c54195.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 0xbd12e716b455df3a8b6ade524c2f1c16343cc1805d0e9b077a93d4340e09462b. 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/QZES62044634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5884147162af938ed03f683d7586e3e2b620376e6f78a6b03f8637b31278c81. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6H2052071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a75cab182c5b97f05309d967d2ee96aede300b6e7dd0a4c54a2ab4d398e4aa9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6H2052072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d76c2a59c461995091affdce23d897c993c68607c8776529434fb83edebbf9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ32114613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7ac0ab6e1be71d427dee298ba403ab1e2f1dd7da6f988199d69b4640e1460c. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:09:53Z), 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/QZK6F2181552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628725a6608d98e578d689b928be854f9eb04c3bd406579b20f8b4e03cb7aa37. 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/QZMEQ2129528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a17e18ef116a2222c11af3f5ed99abed4d1e36f97e8fa98b8148f44bbd61fa9. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/QZMEQ2129529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa490054007f93032fdbf3041a4af83b9133614d9279d2c90a96b65651f7594bb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWZ2244001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a747571ba31016decf8874f222ac477178024d80fa45452cd0501edd42b4a6. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/QZTB72379674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29ef512192693b7687880b1638ff98c6466b2180787ccbd6d079557a455c5ca. 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/QZTB72379678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a0bae4a993a0ed9d2a0a31acf60d00a870528dd422bf3d2196c6091fa41557. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:57Z), 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/QZRP42465003.