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 0xc23a2e9eedb8d267c655764adc19072549b5da121a6a5319da5103eee28c0e4c. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/383f964c-39a6-48c8-803f-db9dc6fcd9fe.json and https://artists.proofprofile.net/proofs/artist/383f964c-39a6-48c8-803f-db9dc6fcd9fe.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 0xf5e73f74b9b6fec2fc652beeb661a40d13b569ea25114e33eec6bc7f61780fdd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CAIQ51900019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f734c7ab32843cf80a1db00013aafea833db6fface4bb9cbeacf07a12102f0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAIQ51900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd620ac0d7f32ccb39688257b0b9be3944d42223a76cc1e2ed30b2c77b8e14e52. 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/CAIQ51900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40a2148ec8a1aa4cfc462421c38fb5e8c159ed14d78c2ad6c1f1af7923c9957. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/CAIQ51900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b9e3280ea7b2c0d5f21e77124d0d06969e63cd66316882756cabb3d880e547. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:42:55Z), 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/CAIQ51900024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b7471565c1fc7645e67edff80b40544f8b8981195cce18a305d9d641932d69. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/CAIQ51900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d066031dc785d72ea7a6e037ffc2dd45eef6fa4260a667903cef86104bc5f6b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAIQ52000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f943e0db586bb7daab91e8a4f393a9f29bf4855e4479d115332f1ae3124bd51. 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/CAIQ52000028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9753b5f7f40e524ee5c04685fbf5acb658dbfcd4fbfc504b477f63f18d20b584. 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/CAIQ52300088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb1077ad41760fc3b903d6375a87069e4324e453db0816f44931e00553c58f21. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:55:47Z), 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/CAIQ52500001.