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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272902553469234d5853124b5c0617be932822d8dbd59c2835c9e2ec331e1164. 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/f07574ba-6cda-4daa-a923-66416b850537.json and https://artists.proofprofile.net/proofs/artist/f07574ba-6cda-4daa-a923-66416b850537.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11dafa619c1b373fb0910d90893cb62c8211db0e83df312eac3ac253dfed134d. 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/HKG731742505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944ea408ec5a1dfb4e2f82c1146d97aa52c2c54c2e1227a98cbcef8155c449be. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/HKG731742506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f494f0b58ac9789ee0f97de1da8b9394f645fcdd349e01ad279675a3df2a9fd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DGA0P2343828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364d9273ba0682bfd0a31c012ac92fe24a909e25633324807442ecccbbbe6d8e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR2X42371535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4802dccaa399cbc1fe96edc65512c568f16c63d5550ccda2c2708fa34b0c388b. Chain 2 (Bitcoin): anchored in block 957242 (2026-07-09T01:00:33Z), 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/FR2X42371536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd980c44d971bdbf0eaa1ad9da43aa90505459d1ce2bbc67b4e139f11303fa37c. 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/HKG732228628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee32d93f73545e3c2744d0fd48b219ed29aba5b10141be1c37697d71a6bd08a. 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/HKG731720498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32bccd11d812ca6acbce5ef3d009e58957943273d8aedd9aa14cdb9ded5c56b. 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/DGA0H2459141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa2e318084a113644431a816a0c8bfa2032687078fbeecfa6412f6990205cc4. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FRX872411898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a499ed3e3e4f09577ff76d6137c312868b89ac998b79b0ebe8a0ba1004e9dd. 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/FRX452433773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816295af03ba0ab5686aacf50820171b78ab6ea75c7ffc38efc41536306369bc. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/FRX202451801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57dd88c7bd9071795b43b1fa3498e3e6cdf010f6b4201170f5e7280cd7a6199b. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FR59R2499249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed65907a7ea253f88ba440bb482104b38c2f81f5d237bbd375609a7646259882. 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/FR2X42423894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785237eaad9b43059fa2984dcb8c23bff7210af36bf7f49d1d2fc2af5a7c2be5. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DGA0Q2327333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b718b84de18e55c1400ea014909a721e2858ca5d181ceae1a03767ce5c0ad0. 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/DGA0L2353109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc7bc1ff04f484e9bc67a69ab82ddb28393382cc0de0ef7dac7a9e964e222baa. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DGA0M2325807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85bd96166f716e298d96fba0e753b640053e0ed19bf36c6001abe46d6348395b. 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/DGA092379896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e050fb9780ca4fac858a26b6ae740bf48bf2be151b55bac7c8cd4b3e73cc21. 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/DGA092323609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a00dd6d15a796d359f82677eb279db7dfb3c446bce5b405f2467cec4a802cb. 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/DGA082392827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74e1da03b2249bdc1281b77e9979c9ce6fbbc547013b38dcd43d869ed644ff5. 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/HKG732268684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c7d342f29773bfa9ecc07e47d0dcf40dbb155fa8766a8e7fc2afdd2b009ed5. 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/HKG731760302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cbe751c6c7b19f44433fbce481aa7a6f3309bd0874a69f827fca0ed2677ed7. 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/HKG731726679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f5277c9de974657469aea1b8372bd19b053ec8d9fbbe57005a3e057495d066. 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/HKG731726680.