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 0xce400448b1aaa5e330f74ba0167c732249134660896fd1bd28a9af0d104d4a93. 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/843f1772-f893-40af-9182-f111ccf202c3.json and https://artists.proofprofile.net/proofs/artist/843f1772-f893-40af-9182-f111ccf202c3.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 0x19795fdc31ca216d50145799797014810541e5451eea2162474ddc110cd98e13. 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/QZ8GX1700850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5366816c0209f35a88f9789a1329ffb8127c04e03896ece2273dae00147939. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ8GX1700851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891bcaf46a663479c8a983bb6e18c3aa94288f12c78bd6e77ed27aae404ab96a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ8GX1700852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a012fab5d87d469a09571d971ab9c6b6efe5a407f242c4d644093706018c50. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ8GX1700853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe046dd94f68a68b6058f46a254fc2f8974b46d981ed11a46470442ae5a522dce. 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/QZ8GX1700407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c9e55459984f96bbc42134ef1ce3ba46a07740cf18097f18bfc9f3d0989f6a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UK6KW2000291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1259dea1d07b8043bd7a408723ccea54a08b9810ea9a1501431774ccfbf209a7. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ8GX1700762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe046dd94f68a68b6058f46a254fc2f8974b46d981ed11a46470442ae5a522dce. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZ8GX1700407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacab9b22c04a5a77d7e76515b3d6e9a9e55de08361b67a46d888e1be5595ab9b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USDY41834276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb342fcf5f300ae621000fa8e308077f016df787543fff9275c5568f3d44ba0ca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USCGH1838883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2a6e42cecdcef3a9e493745ee5d797e4efc9c221f45e2d3fef9a62836dbad5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM81737657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb4071622e2e1f45956b06ed1f8e3f2bdb4e4b1d15e061940f2020539c79c72a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USHM81737660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d71098bd9664ee40801e40dfa7e1523c11142b16b40aff4bb319f892d49b488. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM81737661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1903fc43eb9cf050a7b4285fc05f6746976cf1015f0404d0658a7d351b0f3144. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM21769628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90deb8472098d192d40a8b5ae02b4007f8f71be303006bb862bffcc443a05ecb. 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/USCGH1760950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d8fc1b7771d7bd2184b2044616cab6c0c84de4056075bb0b55370b8fa5741b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/USHM81604966.