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 0x657410ea03c2d85fe8e614040306ea95ecc0ae34ea61cf7371ab9ce0f522df83. 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/b9ad79cf-38b5-4624-9492-2fdb4e7e0d55.json and https://artists.proofprofile.net/proofs/artist/b9ad79cf-38b5-4624-9492-2fdb4e7e0d55.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 0x6633eaeadcf63c12c77f82a7ae2521b7bc719ffde95390c9ea61836a8fd4850c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAENV2141752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e81562b1e5cf3da826081513f595212229813fe6607dd128be01ee16768baf6. 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/CAENV2141754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29058e6a290039e570036166fd772f79a16108c77537e787f2a35dbec8148250. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CAENV2164911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2107c10b31e3d4a8b8f193cf9175d7ede92c4c1738d352262b35eebf505e9088. 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/CAENV2141764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2111e3dbb18040bf3ca90a67b1368fe7df0cd4bee48f93111102ba3dc62be374. 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/CAENV2185545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20c9e880801c9b69a26f9a99ab2c46314b59b22ebbf1a4af8abc307cc2625c3. 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/CAGOO2127853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaca8a96eb789606c44b0b16a589673e5d9f420850e87e36586d8dcea5ab4395. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/AUMEV2157413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497536965f1afb93c1283af532915428345183816882a1c55ee1c38cfe6acedf. 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/CAGOO2151036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca60cd57646958176dc507e41922dd8231469c51dc894dd0557240719deee3d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/CAGOO2188919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1084407c66817bf2d081815f738990a112c31cd12aaf74295da5d4550c851d30. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/CACWV2124999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f23978971549631800d3bb6f121ded7a8ef1e0147b944a456dba3cca450ef66. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:03Z), 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/CACWV2124964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e6dfd99b6068de8216971414f8eba2e494e4d04199fc937ccaae9be4897bbe. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/CACWV2208341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f0954b3a9481cca0568ae2509613f442c9a66e02a7cff6b5afa38ef33c76dc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CACWV2238927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e0df79a124dc111acad23b61774a6feea44f6f1fde9b938516f4569ebd887f. 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/CACWV2238184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d189b50b0de31f86b7d1f906a0afa037f258566f60af4b2e7a23aa0f6026d70. 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/CACWV2291419.