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 0xe47836ccc6b3f48d7426cd9752db93b974b4fa39d314ab20ee08dd127a57680d. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/053da7c4-a1a0-45dc-8d86-02eb2e966504.json and https://artists.proofprofile.net/proofs/artist/053da7c4-a1a0-45dc-8d86-02eb2e966504.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 0xf54a02f40fdd886622480fa63c45ef9f21e9b10f5135c98f6b9df28cc0e092f4. 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/DEQ022273116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57102bfdaff07852c2042e85a0904bab4490365b32bff65fa18d9d978f385a79. 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/DEQ022273117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf54a02f40fdd886622480fa63c45ef9f21e9b10f5135c98f6b9df28cc0e092f4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DEQ022273116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57102bfdaff07852c2042e85a0904bab4490365b32bff65fa18d9d978f385a79. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEQ022273117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10618befb800cc26013c7426a810b0fb8c325fed1b16e90363459154392983c5. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/DEQ022384427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a321460706d57453753988885f28109964a76b47164f395a6c7928268bab00. 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/DEQ022384429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0831712eecc75d5c8a1d298b9e170e7075713881fd993edaecf91281ce9a8c51. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEQ022384430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2779421fe9c9ce875a38f5121e8dcaaac884ba0f4e85f6f551f19ce3a26cd528. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DEQ022384431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dba80fdc810b11cbb6afd7daff1fe8e16f1a88f808432a00c67ec149bc86d8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEQ022384434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e29e8f25dc7080ce228f77333fcb3c9ab960a6fe923294021e4ec25073fd85. 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/DGA0P2484589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127fb2006c54aef2911803a78985eccc400f46b58a9e0f339bce76c1b2cb688d. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DEPI82512944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127fb2006c54aef2911803a78985eccc400f46b58a9e0f339bce76c1b2cb688d. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DEPI82512944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44da880c337989495e51dbd24901635c09cc66b1a1b397dcf3cac6975de88914. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:23:22Z), 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/DEPI82512945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83db76ade74fc3a3fd7a34344cf0c93d8c8fa257d0d178f95d10f7418deda31c. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEPI82512940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599cd38caec5ac55d29d5884cfe15870250694c0d352deab074586b5e4ae7df7. 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/DE1QW2510972.