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 0x8c736e11d169d55753a2ce06cf50d0896477a8d2109afcccb5a631f1e8ab30e0. 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/60a258e2-d87e-44a4-a605-98915f255957.json and https://artists.proofprofile.net/proofs/artist/60a258e2-d87e-44a4-a605-98915f255957.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 0xa0d40f504aee4b5ae44a467308c877b5152ce41ddd527ad4cd476c041dadd700. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/FR10S1970144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93330668a639969248f69f15fe61cd8f7d9026ab7d1befdd882f7fba9a2b37e3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:07:36Z), 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/TCACF1587632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x920733a37bab8628e4c8cef29499236880637f4f8a8f1aef041e3f1c074d0451. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:36:40Z), 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/TCAEW2040034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3965a458a1c4f6d9503753939fc95f34bff9cf48311fff7fd33721ebe35daf98. 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/TCAEW2040041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd233d393d2ec59941ba8379536de99943afc8a6ecc826a4ce005c9d05daa0d64. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/TCAEW2040043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147191bbda9602a06658c6bdaa6d5ecd8f7ab0e852296b562acb4032dfaffbb4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAEW2040044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acd6b5c08c3719a87110936430c24bc4f70ca70f301cab99ca66c3e113d6117. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAEW2040050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d56571d72807c103e0d925e2dc0a0b5dcbf1d06315a25c09710e954072c3465. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAEW2040069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0190c2fd9b4cf216b5ce0552a4f7f524626d716a737d7b24be2855afc4f0e31b. 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/TCAEW2040073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x606825519aa05eb267a2cda34839e8e076d49192b15fc7ea48c3659b9cc9e777. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCAEW2040081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07cd04d40e393584d7b7795cc1ae74978444b760dca8c88607cf6d8a7468b878. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAFF2099918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035dc5a03e567583975c40c47df13405a383166d35a7db774d7dcf64a655c2c4. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ROBRA2401643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf038228fafccbfb3d4f46b95b5551ab8eb608b51db8e25053a68f476f16122a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ROBRA2402737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x675eff69705fed3acc4c1b3a141763e4c346e85c688056daef49887deaaae601. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGD2267776.