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 0x5e2a5b83d99bff8940f7fe173e29fe2ec81bc3b589b8fe2a42a46e5f7f435db5. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22ad94ad-c527-4730-b425-0d08bee1c527.json and https://artists.proofprofile.net/proofs/artist/22ad94ad-c527-4730-b425-0d08bee1c527.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 0xc9bb28764da92bd4e28ed246bb7c5131711f5da7cfe390fa4abeef769f10103d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNWY2285892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f66ae0c736deebe2304974a80fab0a9708080911238d0456887355ddc94fa5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWY2285895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffb1b520831bdb6614697f3b54a28c3eae43ffe020bbddbcd6f1f4bf82dd7c1. 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/QZNWZ2236650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a80c4bcdc5139dce9aa67d43990954b596fe6dc39679092f3a147eb0ffaba35. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:40:30Z), 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/QT3F22455015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c924c89ebe7a6ef6a0e6c7c3cb10e59af8e61c03ffabdbf14d6c33930ed14ef. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QT3F22455016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf2be9969a4e8595b11cff288e10f2816d08c421eaf9106758294a15daf5923. 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/QZWFQ2419110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a58631de1b1bc037d0eab30101fe95a2c84e87de38a9a1a2d15fbcd8d5cc164. 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/QZZ7P2411593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb373cc1c4d9896d9eb257aaf19994517f1d4ca3f960144ad346af5ff19fc4ced. 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/QT3F22455018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50634e0ed2c105c733b55890976d2b661864753684d4fefee96de3958a94ce9. 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/QT3F22455019.