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 0x37d75e080016ba254d33a1db2e9dd91ea59e1bba420a575a0bbb9ceda32d0623. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa3b6bd8-3640-42f9-b865-73abfb30942c.json and https://artists.proofprofile.net/proofs/artist/aa3b6bd8-3640-42f9-b865-73abfb30942c.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 0x59b394b09e7584da5fcebc0f635834f92e41113cf6cc6fbd03fc7fe3ab33725b. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:38:27Z), 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/QM6P42218900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1590f70053a2eafa959ca0eb3bb042ff76130a2382bcce322ef99c164911f5fe. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:24:39Z), 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/QM6P42225474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd9e67b8d1d26de0c74b8d6f79a87c3fff78c3b950f0960829d5c2ef8f48b87. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QMDA62250407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd38e629eba0ab329ef3098671538711157cf8ca79cad99825a3701a9f248df. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/QMBZ92338987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9240e47dc820db33e4d57cde0aaa11b4b8b6a93d7d969b8ffabd6b05ca2369b0. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM6P42467609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528ac1739fe31b4dc941d107cc9d669ecb05de0de10a742aae6ea93185792778. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QM6N22575139.