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 0x3337b9b9b26bfd3aa12e2d9ed368cb48ffe1fa3719f9a890631a854a10deeb99. 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/6a17c937-e48d-43a4-b340-70778ac8f84e.json and https://artists.proofprofile.net/proofs/artist/6a17c937-e48d-43a4-b340-70778ac8f84e.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 0xf32ac94b390998f08b313ce70e7e0ba75ea6415fca48c21af2aba71e0f4ac0dd. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), 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/QZK6P2011080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfd96fe329ce9d7165f99799f9a7eaa3a19d957fabf48866949b312b3763583e. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZPLR2044251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc5b20239825bb2ab194a35cba0924e5d5e8d78f5edf706aeaea72ded7a3fab. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/QZFYW2185327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76146ad6e5328dcffeff0995046d39ff6b46f992e0e88fc49d2d5b331485f8e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZES62163177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369ccb81a492cdcb0ee212e410312cdea1bd5663bfb99007d826541f9907bbbb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES62163178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f8f3c1685812f5d56b64fe3f52fdbd9b8837c22669fbadbbe43be53f0ea8f3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZTAT2172803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17336eec001c6aeac8cccaf0c91f7cfccb414131db16bbd262349e3114b1e2e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES52276804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c1259445fc5406426b7cb71cff4c05af2ed4aa8a3e1de9eae16b6aa37ccda1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN92293711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7fc1a79ad3b21008811da59a51ba808e3398d5b033753386354d7e77a1b5b2. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/QZHN92257867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7153ece07b0fad3deac1841b73956925947382ac433cddaef9001109af53819. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FRX282280102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ea9d3f27d9408d558ebe437f7a4303a51cec4806bfd2c625e97ecf25ed83aa. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FRX872225908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614cb403a626053bf84938a49ccf4f0968005ee718e3f6b2ef632699a135d034. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FR10S2301274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddecad530e78a7a423cf710bf225ac4f9d485017080b36c2dc49ff1ebe8a7059. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/FRX452357427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf3d9edb559b0544f9b35e9cb7eaff3f761abac06e5636a3b6483233abe4f83. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DGA0H2372305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2def6293aeb55b32a2bece1e7d91ab048320ac296276040253d4fa46a48e58e6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/DGA0H2353550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b834d63706127a719b1df11dc251d22e590511e90720607a48c290756564602. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/DGA072342803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619969fb52ac64b81f9dff8431bb46832ab85955be2dda6ce0f2c1d10fd76ced. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/FR2X42406016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03cd7c38bef8d0bbde95cbafe09ff218e97144f7afc963dbec92ab0a50c9aea. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTV32424795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674b5e33c43e06faf5923c5b57d91f98e05425ff7002b3f205bda819ed2c4dc3. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZWV32483348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674b5e33c43e06faf5923c5b57d91f98e05425ff7002b3f205bda819ed2c4dc3. 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/QZWV32483348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b83b60b6e7f7b4af995b9c9e4c03189250b711b96cceb687dddc0f4e3c74756. 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/QZWDD2498940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03cd7c38bef8d0bbde95cbafe09ff218e97144f7afc963dbec92ab0a50c9aea. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTV32424795.