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 0x681f6348008656ba17dd66c198f8ec7315f206a650a890117cbc35cb82f6fbed. 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/87a38b21-a76e-45aa-b859-6334f732c504.json and https://artists.proofprofile.net/proofs/artist/87a38b21-a76e-45aa-b859-6334f732c504.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 0xba55bb4c0221bc70d857945b4f042228db03b6faa6575b919a4a07e1da33ae27. 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/US3DF2480425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2daee9125943492b423d45901327593933487e838b749c001bb85e7fdbbbffe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US3DF2471832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a9e20ca6e775b00fbdcd51729c8206dd23dbd62564f5134e34b73a4137695d. 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/QZHN72446945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794baa163e7fcc3d3faf0d84c11a03d5ae867da70c8471488256b762ae76e7e7. 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/QZDA52450253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8f8d3a49bcabb90660cf284c761287717870c054040bb6b6a77ec8bf4aad09. 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/QZWFR2351767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ada639a1f050d8526e2fdc7da8269bf147d75c1a2244292c7564613b03aa5c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZMER2226842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae047c81dd13f58b156d3ed84b244488323b6b9b297b0110fcabf8705cb8d9e9. 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/QZTAX2399094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f6ec8a37883731deb41e1c007605848babdea09892155daf497a71c309328c. 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/QZFZ62322346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff1ab16aef4bc75d1b84140fbf5b1ba9a20eb464b13210c722452e4bc98d840. 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/QZK6K2331911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b767ff5dc9ff8fb0321aec6361f338d653152ba64d8656ea6a82e45bc60bc3. 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/QZPLR2382544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bf1c09ad31afeee3c66f1b797d2230804aa68888472c3fa4c83250b330dd6f. 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/USANG2273687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f6ec8a37883731deb41e1c007605848babdea09892155daf497a71c309328c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZFZ62322346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e21756cdef75d01336344deb69c13d3402a118dbd23e9a6682ad730ec65cff. 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/QZNWZ2215755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333f2663654fa4bcd68fddaac2b122e7a7287f80f85b08c7e6ab28c02ca3aaed. 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/QZNWU2240901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ada639a1f050d8526e2fdc7da8269bf147d75c1a2244292c7564613b03aa5c. 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/QZMER2226842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3b846fd73e3745088ad9a9177eb98fb322e84119d67e0fa742e21db3431d7b5. 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/QZTAU2594575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c570903f8fb8f4bcb06fdbe0c2f5e2564462675e769fea4e7c520bdb6eecbf0. 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/QZHNC2555039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada27256da61f3049df774a40c873556dbc6c0fe2166711c04a28db6cd5ce8b3. 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/QZWFV2443080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762a5b243ffe46207f5667b31b4bedf41a91c5f266ba98430d87690cb2e2d3dc. 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/QZWFF2471028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017202386b8cbb71db9376a4fceff8a8af8d8b37bf3f9ce38c5f2514ed00e117. 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/QZWFV2443081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a9e20ca6e775b00fbdcd51729c8206dd23dbd62564f5134e34b73a4137695d. 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/QZHN72446945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794baa163e7fcc3d3faf0d84c11a03d5ae867da70c8471488256b762ae76e7e7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDA52450253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762a5b243ffe46207f5667b31b4bedf41a91c5f266ba98430d87690cb2e2d3dc. 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/QZWFF2471028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9bf1c09ad31afeee3c66f1b797d2230804aa68888472c3fa4c83250b330dd6f. 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/USANG2273687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a08ea0aea6e99d40126436e2bdc237e032381fb777568d8dc277610a4f4efa. 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/USANG2273688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a60b02135c72833274d3995376b288b1d2ad86b24267e05d72609b0eaeb18f8. 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/USANG2273690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4663d0f82162ec586e6cdaa5a5c370a240ed75eeca514864acf11ebd59b9c27. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USANG2273692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004310af5070ae81aad14d2bd89cb475d7231bb9d972ff20b08ac1cf25ac9b4e. 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/USANG2273694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c95bcb366fe2ee8a0e22539e21e5322df5cc1a19d927b0720be365aa4309cb7. 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/USANG2273700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ab38238f0a5f764636b15c04ea53c047a2d02f49cac570dacac6077a244626. 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/USANG2273704.