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 0x3da1bea00a0ce45ccdc14db366f3d1fd5cae9d9f4d49f177c27eca863e3e46a9. 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/2516c4ed-d34a-41c6-8ed0-4a1ccf15235b.json and https://artists.proofprofile.net/proofs/artist/2516c4ed-d34a-41c6-8ed0-4a1ccf15235b.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 0x95408dc87d31ad2440392cc381dbcd7170b92652d1e8712597475271b040508b. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZFZ22551885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ec225ef845daa8395220c616fbf590e52c0e4305b2ac4ac8be769cba51f1d6. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZFZ22551888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9b945f8a445bf3db59aa37f1f2b224248a3c0910f36cd06b08319dfe68276c. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZFZ22551889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625def61f03244298bd3d4241cfdc5b2be8b839ff33a8294ec3cfada36d4a4f5. 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/QZES72592899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb1e3b89877c3f82e2b61a29346d2b04d78038ba9c923ccdd637ff020797a77. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZES72592901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c9119a9ea49ea4585e7653e8e799fc86d0e1ebbfbab47b8b47c35b65cc6d12. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:25:54Z), 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/QZES72511677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5fd00d889d42c5b830232257216429b536000a60f0c5922edfaebe76d1900d3. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZES72511679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01faddb7e3e442929cc3cc5c0c98fefdffcb4cdc92d07079088ac1929ebc3dbf. 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/QZES72512792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5d982e05ab4af8d67f8d12f70a7a8285e6b99be7e143142e4f28c3f41bf3b4. 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/QZES72512793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1664097a47db4137f68e3c4d699aa9839a4498d7e67f163515438ca60555cf0e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6F2508344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85afc0e835adce93b8bf530bcde525a5f2b8ea2499902042685f030fc1c822f5. 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/QZK6F2508345.