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 0xc9fced2f0fbadd3f67b7dc06607afdff29e59ae66e20d41212313df14229d763. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5545772f-edf8-4e17-9853-33d7bdefa947.json and https://artists.proofprofile.net/proofs/artist/5545772f-edf8-4e17-9853-33d7bdefa947.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 0xb2672130366c0e5e1e6f4ab58d1c9b182f4359924ae6ab5aa34bf3a0f18aa9c8. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ7Q2440443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb0cd3830712520475443ac49d2ee27a48fb1e74d9494a69e625b0651ac3a78. 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/USCGJ2559463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c1dadedf4567b6bf916ad6f3d57563ebeba0d245b5d09939b352646bbde616. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/USCGJ2559469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b948e191cce6f95f5051da4a6365c26b3b82d2eebf1c40fc6d84a26af26522. 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/QZK6G2580092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa0979becefaac2b87efc75fbfba8c41112ea6fcea20a243909a043c8986931. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZTAT2540951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0edd85265f8e4c18c398b5a348e731ae64def172612761b02294416a0c40177. 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/QZTBA2552449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c324fd17a686d8e854cffe7f3f801c5d4006785f47c52ea872bb7e4ad57ffd. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZ7N2524715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81269e6292145b921789e2296bd197b2a6badbb467c04109ef5392814438cdd7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QT3F22513355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ed9b63cf60c0aa5efcf2f37fe79150fd30a3a00ae349d619e03a4a7ac2ad24a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:20:14Z), 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/QT3FE2599044.