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 0xfddc43855cbf90a2c5058bec34720cc1c7636fc5bf653e772fe989b90fb9ae24. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a929e6f-f905-43f9-83c3-fabf8a7e49ea.json and https://artists.proofprofile.net/proofs/artist/7a929e6f-f905-43f9-83c3-fabf8a7e49ea.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 0x62a8b425eb785ca4b5c6957f2cc3368dc6e838052c42fd9f5de912492253e280. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QMFMF1392684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76d1c3c3f85fa3db69ffa92b0ae9b440d0297f0ab9e563d1fdd4746c8199e04. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:00:04Z), 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/QMFMF1392685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567ea77c2cc22f734ef3355428bbf40ad415de78a69f583becf368a0ccc73e2f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFMF1392688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542a10bc92b11e72f152dd6652b16d83dca07ab96e0761d2dc21881ab4c2a9b5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QMFMF1392696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a336d53d8c9fd26af1be5dccdb89fa53042b5dd8b6f971b1b1a9ec10b0c16c. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QMJHP1600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6db9edab824096b8a2821751ebb541e7bf3ee91b86bd2f264b7a9d9dfca5e9. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:02:19Z), 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/QMJHP1600007.
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