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 0xb3de3c9feac04623ab479974316fe556636ed9a6e853af4f12789675d4a05c56. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a2bf132-aa65-4b0f-9ef1-61f137f6c129.json and https://artists.proofprofile.net/proofs/artist/4a2bf132-aa65-4b0f-9ef1-61f137f6c129.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 0xde3bef0b4063a1362f3d28fd6d9ad11e889e88b2c3aebd18a1a21b0b3c6bfa86. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZFYY2183296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d12ea7aa955c1a2dda707cc3cf50ee3408f0f263173673e5856978ae545e005. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:49Z), 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/QZFYY2183298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ee7011987c549a93a96d7c248babff54a2b6a4d16ab377f4aeeece3861c2197. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFYY2183300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81167ec4f4b1f587827c0bdc4938254c5c4b464261e6e9ee1da5fc66bcc4040a. 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/QZFYY2183301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x139e975fcbec9439e7531d25d76f6b9442eb0bdc7c2e2a33d521334f06925a0e. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZFYY2183302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e2e33d19a216865b1c0740670055531b374235be04cb47c5f306b728a9bf78. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZFYY2183303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ccb3b9046dfc1116aacc965c886a53075364fd38084628bb09d874c028ee41b. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:12:04Z), 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/QZFYY2183304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0cd939d2c13e056663a67a72396d5be262d6e7e26c233a284519bacd9ff812. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZFYY2183307.