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 0xea877eaabee2edb35f58bc59aad5a327d3b26cbd9c2b4ee88e0adcad677330dc. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1980596f-4557-4a8d-ae5a-172660ebd58e.json and https://artists.proofprofile.net/proofs/artist/1980596f-4557-4a8d-ae5a-172660ebd58e.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 0xc4cf960b37cddb22b2cd08b9060547351863f3cc9d3880a7d3dd7e5ab2563e7d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:06:41Z), 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/AEA0Q2130258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5aae8767ec194b8df4213d8e0dcaa222b58d23a107fb7b3736eecb9e073eed. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:42:54Z), 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/AEA0Q2130259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194562e950fa05d875ab688e835a1441cedaa78d57942b74c6f6b059f7a082d3. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:24:28Z), 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/AEA0Q2130261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d8ca8c74dbc1daa97cad9e19d883ae7cd509e30a4bc52ed54bc9900e205891. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:54:05Z), 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/AEA0Q2135001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39fa7a75ad8ade4c239f7671432304b0490089045f7203ae828be0fb730ec98f. 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/AEA0Q2135002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d76ee4443a2c95929c4b847777f9b46f71c2673ce3e83fcb07df8f8b5705860. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/AEA0Q2135004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c241c383e99fb960e02c29b44c9fd7b67eefb10811c7f1b750937ca47f0f4ec. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:32:23Z), 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/RUA1H2394674.