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 0x561053abf10ff78729fcd8fae8e158820224b3c7f8fccbef31c2e3cb5ab3e7e9. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e34824e-0f21-4beb-885d-228f5a211cb5.json and https://artists.proofprofile.net/proofs/artist/0e34824e-0f21-4beb-885d-228f5a211cb5.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 0xb0955bec290559eda47c92d929c3b024e5cabb2cf23369652c67bd9c210c1221. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAGL2290835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1da684ca3a54681730d45384d7ca135fecf91147a333b6c0bf22e8987648d4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:37:58Z), 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/TCAGL2290857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3849d5b854f25dddd5d4a03925ae9e464f836dd0fdc882f68728a48cf0124706. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAGL2290862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f6a5a8e2cc1bd5c76fd9b2cd5b9adb9aa2ac3cc55b0b76486def0bc2f968dd. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:41:10Z), 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/TCAGL2290875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451aab0531a6a634749219852001830faaf46cd171d2fc6607e0b13642350028. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/TCAGL2290920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268d0b0b75adbf3201ac07d082d2201ea3ce45fcb28a969d7fa5a693c7d99e19. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:40:48Z), 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/TCAHU2497810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3a8aa87c4e4af08c01aa070308bde05d05f6c3da9db03e57672f250b406b13. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAJD2412707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd318cf2964c329ec5a38b4d850a39045123bcec67892c7369a63b31668393fbf. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USHM21864602.