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 0x5f5c0c79b8af7394d9a9e3659a873185e51c7c8669f9b98322c0bf6369346598. 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/fafdb12c-001b-4c72-bdd7-9aca9574b93b.json and https://artists.proofprofile.net/proofs/artist/fafdb12c-001b-4c72-bdd7-9aca9574b93b.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 0x9c9a6d9966e588c3721efa9d38b2714735aa730dd185653452c37c40fa28f969. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ATT250700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf088a2f58d66f905552d85af7fdd86e35052da7805f1516e3377c99bf4e35a86. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:33:10Z), 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/ATT250700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8efa67100b8443bc018abdc86db96d1ffc71f86d46cc5aeec75fa3665577323. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ATT250807270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c57b0e8d10a7b8e352ee69d13c26b3335d8cc8c8932805dced539fe560828c0. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ATT250807280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046ca95cee25cd855736ce928710fff8eb02fde9cc279841e69588191e0e504e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:36:45Z), 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/ATT250807290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16cf2a077359fceb99364c9dd0121e5d9f1bf3f297f25e9168820cb3309a347. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:09:55Z), 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/ATT251007500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d974342226a2b51d5108419603edc572cd80f4561fd1ca28439dbf0182aaad. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ATT251007510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143c549879f93134f44a11d4099fe550d1c8eb37098a78ddedb8f9a344d3b7ea. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ATT251007520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b84ba4efbd8ebaa91e9bf3bfeee9cfd432c75717840f7ce941f379b180bb4f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ATT251007540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7614c0e037fb037172dc5708b4cda7e91926959f688c49f85a6b2bf83b01d4c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ATT251007570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a868400072b125b032be5b2149ecf837516ea44b118f615c0e26a7d9642eff. 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/ATT251007600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ca051e78b51e8389ad56c1de2e848bfcb4368a94875db1895ce29302622f40a. 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/ATT251204970.