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 0x16cd91bb881ae36e20fa4a513bb542127578fa5414013a08d24084c8bf2e735c. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/844e6cf1-b413-49c3-8031-4ae67874b18c.json and https://artists.proofprofile.net/proofs/artist/844e6cf1-b413-49c3-8031-4ae67874b18c.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 0x4b7a061ea063e0854d26a7370beb47a455a2f107673f7293a019dc7a9895a5b9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DKQP52003403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681334fddc8162d796ce48b661fba0b04aae348b4a7ed5f57793a080025b1c14. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:56:33Z), 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/DKQP52003407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69f706269a6421322facbd6dcd7137e98fd349f9c8fc03f44de44ab503e2153a. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/DKQP52300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b94f152c6c0002b69c9f66128d728b8a242f2a4834f8591ff66fdee24055a13. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DKQP52300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4664bb305586be51db1bf1d5348ed374bb9bd1a578d442ac68f7bb8e724ce72c. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:44:53Z), 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/DKQP52300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58acad8a5b908501ee34cfb38ce6cefd3d029f2ddba572ac50e2359a4a5eb53. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DKQP52300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aba4433f6fad212994ad2721d359011b3f91668c5356d90f78c1243fdec02f2. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/DKQP52300308.