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 0x2db34775d5a0db4adbd0be8012d4f10f9548e3f96501e906ee70b31df89512d9. 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/d8ec4c32-c49f-49e3-a0bb-03831f9c45ed.json and https://artists.proofprofile.net/proofs/artist/d8ec4c32-c49f-49e3-a0bb-03831f9c45ed.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 0x07858af15b3a72c5936d3a7a5dca0f7bf99855bf5968954c5fd5030ab1878018. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:52:36Z), 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/TCAHY2417103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc68c7905a2c5505e8158054fc4493eeb7b7f340db63d29ecd75b796c23b330f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAIP2410173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d992a98e9df730f0a5799fe36e7f8900da3de975fda6b3a92fc4600847eb53d. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/SE6SA2491129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999b29a6a9ab96b09275220a63c585e8d27985a574f440c484fbf3d680259ae6. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:06:55Z), 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/SE6SA2491130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387f13d9650b9ead03f3d48be4e26b939787e2b6e04a953cb4a1e6ca6029692e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:08:10Z), 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/SE5BU2547944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64a8d78c88d389da51255d3c2845114816c1af433cf8dad3a28d7aa64e31546. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/SE6XX2547633.