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 0xda2fcd6fe98e73249228b6b3eee51505d9e8d9fd688e96ebd9c3d707324c7b74. 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/6ef5d7d6-8dc5-4f6a-8e43-9910ca2d941a.json and https://artists.proofprofile.net/proofs/artist/6ef5d7d6-8dc5-4f6a-8e43-9910ca2d941a.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 0xe81e1f02e7abf47936e6d9ebc349247cf34692360159eb9ff579dc436931f695. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:41:54Z), 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/FR9Z62100412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42f730df0b99ec6326976b6df0c198550ac1b1f1dbcdec37335d20cf654f25d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR9Z62100409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87206120c237868a0956f190493605f8ee4150eab37aad0f230d3638078d3dd2. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKQU2524926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e5495f121fcb9c7ae70ab11c97eeb15f52dcb480c1e0bba9947da88ce08517. 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/GBKQU2524927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20957c944f489f8f70e5662a4b4e9e925e5deaef8ef810bc21163e6953c0aac. 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/RUAGV2505403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacace76267dc9a5f0584c9152ba08b0efee32ee3d64db084fde3c3277a2f3dfc. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:24:24Z), 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/RUAGV2505405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdf44832398954a97eb341e96361b898fd6eff429f61d49ef5e41df53f7cfe5. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:32:45Z), 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/RUAGV2505406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd957d5fcf0271ebb2bc86551d7dc7730b6a3b067ff355e5aee73fb22d836f9e0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/RUAGV2505975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f619ef6aad1519147b395992cbfb985f039e28a401a21208c410a64f9d33dbb. 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/FR9Z62300144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0b7f36afec8654927bd6b9f8724a7c6099efebe75c5c28bb2001554a060d39. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR9Z62300730.