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 0xcb0a16e1abd339e14c00baa47ee5a65b05bd48a08f6bb89994d3b68622d7d8fd. 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/c3d41b2c-f468-47d6-bc8e-617c69271850.json and https://artists.proofprofile.net/proofs/artist/c3d41b2c-f468-47d6-bc8e-617c69271850.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 0xfe571bf21e6b114209eb435ce7677c2cdf8f9d80765aa58436bb3032027deb07. Chain 2 (Bitcoin): anchored in block 958369 (2026-07-17T07:58:31Z), 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/FR6V89704376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a07d116da54d65598864b885012a5ebee692b9097d82288934431c1902f3be9. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR6V89704387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe28728bbf318b80b0021595b83b5fc5a580562c327bb0f43cb6427a25655da4. 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/FR6V89805275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1487e271f1a2e46ded52891105c107f5748df3fc4d3bc3810d765e4d532f77. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:54:14Z), 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/FR6V89805286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040b4e2017f16ba3a4202d679ffe3abd1b82de2efe7e3b0dceae8923553ca4a5. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:38Z), 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/FR6V89704343.