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 0x7ef1811a3d94bee3b4778d64241a37803257c06e195827263a3a417b05a42bd1. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d517e910-883c-4921-b850-cf7ffed74247.json and https://artists.proofprofile.net/proofs/artist/d517e910-883c-4921-b850-cf7ffed74247.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 0x4469791d94a72145b15449d84c441c706e25b64bfa59f6756f358c8864c3150e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEOL52300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf752ac42712f020b74daeadae85ec3ffba8a6b218f7442f47e914d4177f78b75. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEOL52300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33100e060a726c3ddab0fa72097fe225b296a37948a38f7d637109877542703. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEOL52300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bbe75bb40295f46c970acb290806a4ab2c410bc716557c30ace5cf8c33fd5c. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/DEOL52300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca70697df49dcb29b4c035355da62c4a5dd1cd24c26ac6ca50c1bb974caef657. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEOL52400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4469791d94a72145b15449d84c441c706e25b64bfa59f6756f358c8864c3150e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEOL52300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bbe75bb40295f46c970acb290806a4ab2c410bc716557c30ace5cf8c33fd5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEOL52300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3606181427cf396f1a6c058a9db08e636d98c4094470ae49d2c7e9d0e3f5949. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEOL52400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf752ac42712f020b74daeadae85ec3ffba8a6b218f7442f47e914d4177f78b75. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEOL52300037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08421c2ba790da65dfc964c85ddd3bb7084b1a3a34fecabfdec91be7eda99956. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEOL52300038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857296d7720d1654a6a0aea533b67710181f9cfc89e10fb0cc47712a55655633. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/DEOL52400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57198cfa57a23e07652350ffcca2fdb1da584b2e16ee6da4d563d7ea50059b29. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEOL52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33100e060a726c3ddab0fa72097fe225b296a37948a38f7d637109877542703. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEOL52300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8c2392550c5dd07af15060535fa74c0095dafc682ada441b6c9ab4d5c683f1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEOL52400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3a6bb1f7e714bd064d2fabf0fcc3fc413254003ad6e7fc1052651b48dd90c0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEOL52500014.