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 0xee77bc3c70f387fcb5ed5bb4fc5123e442723c0fe251e9e197c458a568bade3c. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4e60f34-81d0-4a54-9775-c0a7abece806.json and https://artists.proofprofile.net/proofs/artist/f4e60f34-81d0-4a54-9775-c0a7abece806.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 0x0d54b21dbc45bd70ec9257d896906381a4fbc628a3ef3fb8fb083913b37485b3. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNA2207350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf330877919808d886a0d9637dca500c1e2d0e1ffb65b27413fdef8a13d237574. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNA2207351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d33553ac40cad518fafc4a4a7ec6947ee925b797eb002976df93fa42c507907. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:34:03Z), 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/QZHNA2207353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374c5be8c75e2dcd8b4b8fdc589975655b35967d82e06d7cccaf91b1223b5c99. 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/QZHNA2207355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e4f83b1332dcb8e785b41e65568ac659698c6842b708aa337e68ce624bf0f8. 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/QZHNA2210981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7029b00655ce105170dfe395e252339fb0e3dfd20b5259ef6efdc4dc3171512. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:45Z), 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/QZHNA2210984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a567d6a66bcf2cefc22ab1cb2cd7c82f5bbdee29add7dbc4396ec75ace568a. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNA2210985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1033f752928b3198402614650804578bbc2078ec4263f80ff9469413461224e4. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:42:26Z), 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/QZHNA2210986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02717ab173b96633723d015cd99578c263453a3f76a3d469a007fe006829ba38. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:46:25Z), 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/QZHNA2209590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe786b5f6e17febbc784093c7ed28b36c7a69a3b814d916f88be82494657e29ef. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:53:38Z), 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/QZHNA2209598.