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 0x4613d0009c8cd038bc993fbe37b687e66116a35d70e6ec3d15bceb53c7e322f4. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3436aee0-540e-4535-8688-c7432c1badc8.json and https://artists.proofprofile.net/proofs/artist/3436aee0-540e-4535-8688-c7432c1badc8.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 0x643a8615da4a0b2471f9dc44e83feac76c1b62a8cea010d1becfb696076f7535. 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/QZHNC2508459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8154826da437890c593d432e93381ab4add562fe4e72ec31da9d211c89db43f7. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/QZHNC2508458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643a8615da4a0b2471f9dc44e83feac76c1b62a8cea010d1becfb696076f7535. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZHNC2508459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8154826da437890c593d432e93381ab4add562fe4e72ec31da9d211c89db43f7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZHNC2508458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381da6a527ef9c3e239a198794e1c472609ccf3db26a4f9002432cdcaaad5216. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZTAW2550210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8760a0a33eed4b9a16f1100aea93ab3dae792edca23fe34222bfb7d3235eda63. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:31:44Z), 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/QZZ7R2561145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd31f3580744063d694404921f7e88cb91cbeec80736840d26ced120718136d9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZZ7R2561146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1522fcfc1d411065b0537882fa41add9f9bad75d12712463f491a87de35461. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:52:23Z), 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/QT3FF2500559.
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