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 0x1b8ec5790a22078fd52a735d40a1e7fd7a8b664cf3f489488004a9c231e3e540. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b7db8f3-b7a6-4b1b-9428-996adcd95515.json and https://artists.proofprofile.net/proofs/artist/4b7db8f3-b7a6-4b1b-9428-996adcd95515.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 0x26984531e3565ecbf582fb77e4d7adb6f595030a6cbcc1a999fcdd53a25336ce. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:10Z), 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/FIAPP1236501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498cbfedc3186cd92c458d41bd3e15556d31c83a20f7142bf7fca34ddfc51b29. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FIAPP1236509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112d0f1648d1ad06d28ca961c4ceec58d10538f62eed92a4ad7cd28e788a7094. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:41Z), 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/FIAPP1236510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510bfedfe4b4bf86f99ff743945918bbe2a913c93a2da9e1737d210f7b56580e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FIAPP1438701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672127e64bcc38642ef6ff4b16968942c18d36ee0131ad0ccfab4f894fab9ba3. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:14:38Z), 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/FIAPP1438704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe2e593abc58a1f858eaf668dcefe3dc70ab7e36219e140908e58124cf8da86. 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/FIAPP1438706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b000c11bdb32cc1659bcfe12990147b503baa2dfca819879d8e73f5162d5e7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FIAAP1641405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ef2889db9642114fbd781b6946f16fa778ff615c64e1819654d22194ccb6acf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FIAAP1641410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3de61822b88458668ef5bd3f6b893c7dcbd39f8eafc58c1a76429a67a79219e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:45:01Z), 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/FIAAP1843102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x413ec72b127ae7e17f67bf3ff80592145733c46579bfa66c57a62dd2df7ed327. 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/FIAAP1843104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ca5560558c1424874fecbcab0ca85ac2ef58b2caf8bfa1b52f4110ceca93fe. 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/FIAAP1843105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05c084b100ba458acf28545267a851e9c4a490129efd9b45477a179a3004587. 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/FIAAP1843106.