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 0x9afd1661ea6753881bfee28e5fffc985978e3dc2297301b72524cb128c28eeed. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45ebbcfa-3436-41f0-b938-f2dcffcb5c9d.json and https://artists.proofprofile.net/proofs/artist/45ebbcfa-3436-41f0-b938-f2dcffcb5c9d.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 0x8f3a44f7efdac370b8a64bb8d1b49de8a22d5c0af2135ecdfd18fe88771eda90. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZMEN2337218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6e99bd3a2ddef439b805cb6e22d5e7b6387e8905b9cd5b221f57d5f3ba03b2. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTAZ2360703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7649f5fdd3710a1c2552cc768d6150dd9280238be0a932554090322e2d702a0f. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNWT2577727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8090e286fce7d3af0c619c85b06e23c8020a32fb378d3c161a1856d489fd0d2c. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:24Z), 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/QZTAW2588764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc71d09a3c7150dbcc4cdc5b9f126c9ef07d4135377583f0b4e0739101ca742f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAW2588765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e895ca790ebccacec1053c89d4e275afe53832042f4a949d1576d4920dacf06. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTB92589912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed6cf2981dae37f0c5072fcfe0e6754e9e20fe2fca7b3343607e840023ddc04. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:11:20Z), 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/QZTB92589913.