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 0x5bd768bb93ed1b99a891dbd03e742ed302b79c525208c3fdfa0eaac5c33a5e93. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2589e15d-6afa-467f-a86c-100015a8c6e2.json and https://artists.proofprofile.net/proofs/artist/2589e15d-6afa-467f-a86c-100015a8c6e2.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 0xebec60ac39715970320448fce37584bb5d61fdf86b1246ba99f883baa154b1b1. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/AEA2Z2362453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0805d02cb4b801c0d30c968a4d265e0b3986647f6bc660cc3d6a2ea6ea41ef06. 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/AEA2Z2362454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06299fc00d37ed59a1da8fe9dc7982536bb4f2b469870dc348761b6e52772f8c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/AEA2Z2362455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee031fe7038d3c0a18f476438f67a3ab02a0b5c4f4474fda9fb83a2295612041. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/AEA2Z2362457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57cc20430423326a32de34dabd3325fe26ac297135d422ddd0360a8e3be99a9d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:27:23Z), 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/AEA2Z2434813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06334b58058148ac22f20d2fe2b831e056669150bb47a2b7ddd902ab08f855e4. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/AEA2Z2434815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cde8876db0041bb7eaa27202eb74812502d1f71436b0ea506f8ca5680d3616a. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:29:18Z), 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/AEA2Z2434820.