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 0xb065855b760459a1e4728d8ddcbda2a21a727132c9c13f357e7849e117b870c9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e9ad94e6-73ac-4a2c-b136-9f18e12b4a9a.json and https://artists.proofprofile.net/proofs/artist/e9ad94e6-73ac-4a2c-b136-9f18e12b4a9a.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 0x91bdb2eeaeef529057298042b0274dc8ddac186634cbdf2275179284262d8687. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/IND301300528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c979a477a515d164d8a155bd7b6c174980d6431fdc52439f643e413d2fa215b. 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/IND301300092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4581b7b30c7c3ce1bda583c23e709662073b3109882681b8032238d22bbf80ca. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/IND301300095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f8c09deb81c56c708068a32c87428f1720ff0c58a8d5da8d90510d34eac0e. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:02:27Z), 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/IND301300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd13068e1a6338c85775b880156b6983eb144221e328608561dfd3a67628aab. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:37:03Z), 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/IND301300094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893f8c09deb81c56c708068a32c87428f1720ff0c58a8d5da8d90510d34eac0e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/IND301300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x161e5112e5af476ad907425ba888e248941eb128a37c1dd3e712e983081f94be. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:59:56Z), 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/IND301300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1214bfb511932dd68c542ce76f28c399144616cf3620435c4933a1893a90b7f0. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:47:15Z), 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/INE181710683.