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 0x8d70cdf8a9f5050c85c459c99a6d4c5c61b38ff55aee46a612ac2045c20a4514. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d295124f-7ce1-4c9b-9c15-a56367664dc7.json and https://artists.proofprofile.net/proofs/artist/d295124f-7ce1-4c9b-9c15-a56367664dc7.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 0x6a56a39768c1cfde0387ecd6af7092c88c824e6d44a7fd2b6dbadc8495fdaa9d. 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/QZHZD2562930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d625e23f57928be39c7b88a67db6fd366b60fba66773c8ca41bc23bd52f040. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:31:16Z), 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/QZKDK2527982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb2a24f7739074952822d1e903be11e315dc1a78d17fbe122b793126442f505. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:26:33Z), 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/QZJRC2555957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac096a5f0ae4a0459f10117e0bbb580e53dd70cc6411eebf13ebe1b8d14c3623. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZS652573372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdddd8a75e41b483e79818e43b8d88e12430467b8ab4a7faeb82662035a8df7c0. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZKDK2541226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8999897eb07b1163416eb71d3fd9ba698ae579c862f1e70f1643de85d0cb38f. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZHPJ2535774.