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 0x22a2792f8cd260067363801f1aa9e1a1ef9b62b984f3295816d5e1585b75626e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ab764e2-055f-42f5-8f11-25eabe6cf64b.json and https://artists.proofprofile.net/proofs/artist/5ab764e2-055f-42f5-8f11-25eabe6cf64b.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 0x3b3c739d446b1c3b90856345f94d2572f01c2dddb52397fe09b1dfc44cd212b2. 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/TCAHD2375302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c3edf39566008396f153e591f99bcb3a77c39c97c5bf07cde8eff577e068b1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHD2375304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea2da20dc3aaa8c7dbb09dcf363ec0fc0c512854075a0989f27500bb426bf9b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:04:55Z), 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/TCAHD2375307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6f249563d037ab10ac5d75362d7a52092bf488441509dbd938a6ba39e17392. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAHD2375308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7b314f6c659a04a991f4c1a23a2d81191ebf16655a04e4cd7cc38f999e862f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CACWV2383646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec35c96a3a364453230efa3727d8c250fb939ec36200557aabf851726a03eb2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/CACWV2383647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x808342a46e53c40eba4448b614ee9144fef8144e6ef578b23b56e5c6b014ccb5. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:16:30Z), 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/CACWV2383648.