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 0x0a6582214c40d42167bc7e850d2562f02521c783bb1d72c896c93cb9fbd313c7. 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/79c082a0-4ab7-4640-9767-96c8a4c314c1.json and https://artists.proofprofile.net/proofs/artist/79c082a0-4ab7-4640-9767-96c8a4c314c1.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 0xf80e7945513a586e36cfc79ae4b392f77f14bc0fe61028c9b693e08c1ab91663. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJH2506777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8d6db8321c881002b752e99cd09547b9754a8983a048d9695bfe7a8347a36a. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/TCAJH2506779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ede3f92c7c9215920a3c841a30ab6f8df901c0a7b94762659e50a95edc998f. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/TCAJH2506784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284c72de971dd98f422c06df5ff5999e1c3482224c236356cb8680a4f386cf6c. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJH2506790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42427c5bd277b514756168608715b0292eef50ad580c570dceade0a86822da25. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:19:59Z), 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/TCAJH2506793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe727195ec1ca8dd6b6b1ffffe61ed618398b357b335f83271898deef0804569. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJH2506796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31818aebc786abb1b1634756ee5f106f0f9dc23b30f3fae381a4f7a46ad47a7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJH2506798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72c313275dfa70c59c2d67af70eb42dbbacf240d350764627b711913072954b. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAJH2506801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6845ca1a077af19ab44611c9503b8519d73aa51621e34004d17e3458cc3c36e1. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/TCAJH2506807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa951eb21446a0735962f4da79c86713caef4b13ea8f340399ff519632b784c02. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:15:18Z), 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/TCAJH2506810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c306c686b85938769d7ae61a06f3d35c0da732757c245090c939b20bc827db. Chain 2 (Bitcoin): anchored in block 957671 (2026-07-12T07:35:31Z), 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/TCAJH2506811.