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 0x565432ccf133f91ea0f9a2629cdb541c61460f731981dccd8e9b6b40a865acd2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74bff7fb-d9a3-4662-9fc4-fb6cf95c1f69.json and https://artists.proofprofile.net/proofs/artist/74bff7fb-d9a3-4662-9fc4-fb6cf95c1f69.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 0x6e955e6198349dccd6b5d94dbc81e5ecb0f665e36545b503a73445aa0edef637. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USL4Q1925837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ffdef6aa8761f98f5a117dae191026ae518e8fa5ccbb3f1afa69d4d84f305e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USL4Q1925838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa31a9a31af59fa1e02357535f6a9f6978db648f53b44f7186061774373e298b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4Q1925839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bbbc460013ca45daa65efa87fab51fe74b90b133bcf841c8a635b1f7712db06. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USL4Q1925840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236b30b8f41dec58cf9f6bd79c6ad75cb3bb7b8cef7ad9f806e50d9be6db0378. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4Q1925841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3a2114475530f61b6d40de2c8a055b8c777eccdb107289e6bd7c5194201727. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USL4Q1925842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa21df4ec776973a6f45643345781c46cc2d5830269d7ca9cde81ec5c15a24019. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T03:03:13Z), 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/QZTAW2350535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc469ffe0881af952a75590917064dadbbdcfd75962fce14eba153c70af1daa85. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZRP52432603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e596f71971d92d0de50f5576b9faa8f1bb0f340173816b2136d15e39763cc61. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZRP52432604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98d9a1af1490127a2173bbe139ef6ce71d105f262f92e1dc393c7bfaab3120d. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/QZRP52432605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238f26de6be0e87a51109ad7f793386858f2f519984f3e1825280ae5d8ebc2a2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:35:06Z), 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/QZRP52432607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42862ae94a8b4508324853bdd2f70c4c8943789919688b6d19da75fd9c0bafc. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZRP52432608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40ca03287d2b59ba173dc72d603bcc87611e68024afa30a714117dc26b56c568. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZFYZ2430008.