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 0x8a457596871b1d1d9b50d96c87a063774a47cc094a4a5957b60eb693f146814e. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2022b43-c89f-45dc-97c0-79d0b89e1559.json and https://artists.proofprofile.net/proofs/artist/f2022b43-c89f-45dc-97c0-79d0b89e1559.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 0xd715a9da48301f8e118f9e79be5a536be3618dc20649ea97ef6da07c7d15397d. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:19:44Z), 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/GXD7V2241321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5556373032b92916e01790fb898a8b5a026fdbf8f6daba1ff983c9c5b0661158. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T21:35:36Z), 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/GXD7V2258230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184bf45b98d841e8735a6acc3bcc98b879d265a3c41fd36de5377d82342beb27. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T04:11:26Z), 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/GXD7V2212584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce563e64f3a575b5b34e68d63c4e9f2d9a0c9927093f3263c7f8e543f42bad9. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:33:11Z), 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/GXD7V2228840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e96a321725a5a660d2c613e0d06a68035fa979e9e4f2942cddce6a9264866d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T06:56:19Z), 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/GXD7V2261325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99eb8f91d1a3b2620e1e8d50682038ca21f8c95ce759894160200776a0517fc2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:00:42Z), 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/GXD7V2216950.