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 0x328eca24dfbee1344c1f67d89e82f80974e7f437492b6287f140dfa598e5389b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/107bc4ef-c695-4e07-bf39-ed86c64c7f2e.json and https://artists.proofprofile.net/proofs/artist/107bc4ef-c695-4e07-bf39-ed86c64c7f2e.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 0x7ab3dd65b1a5f7a1463b19aaf4815856f45b0aff52f4d035a45c5dad0cf391b4. 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/TCADK1753015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740b13558dc5fa65dae3e087029075fd9467a390c98c5aacec0dfacec713874b. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/TCADK1753017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed2d9848908f768fd6cd0544f3177f42e0474c708edcfe4acb3aca685beffa2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAEB1946671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efbbf35e65320bc6ead4c4df679fe17b51ff7d22a1e83c571e622aa086fed03. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAEJ1924554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af35d4cd3fe56816b8e7ecbd6ddd8f9f8e3cf9cfdefa7b4e04cfd38be016367. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/QZES62075048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1860d039183af42f627e9be24b381ecd0a29cb7649bcc03f5f223766d277805. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAHC2342928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3127fd7d24702285a7ce32a14889f964ad2398d86f7cb4a9f54da0f965f73817. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/TCAIH2463367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2746575f92939a90177b530e954ee69ceecacd3d9b0c2f5f79eb6e0e39ce546. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAGC2229906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3127fd7d24702285a7ce32a14889f964ad2398d86f7cb4a9f54da0f965f73817. 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/TCAIH2463367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3752566bd4d03c03e95025f6b179556e6cd777a40ba32f6aca6f82265291c557. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLZJ2576282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b034136a278921b2edd98fe868d1fca0bc947e92259a1351bdbe903c99e3565. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBWUL2541501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3752566bd4d03c03e95025f6b179556e6cd777a40ba32f6aca6f82265291c557. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLZJ2576282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3127fd7d24702285a7ce32a14889f964ad2398d86f7cb4a9f54da0f965f73817. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/TCAIH2463367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2746575f92939a90177b530e954ee69ceecacd3d9b0c2f5f79eb6e0e39ce546. 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/TCAGC2229906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a448d9f0164d2a6c997ac0a6b7e222432a9e9427996366f764f6a068e5ec7a3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US92U1800615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305895bc6ff182fdaa0287cd4ba40cc71003ad1e2fa68c305c34488e2bf0bedd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAHW2484270.