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 0x95ff9045d947d4f1efe6867aefab96508d7743ca0102f7f3b63e94a74c9474c7. 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/39872efd-2c85-4d6d-90ba-d2d86a871ba8.json and https://artists.proofprofile.net/proofs/artist/39872efd-2c85-4d6d-90ba-d2d86a871ba8.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 0x4cecaa9de3beb1d1fef665fe5ee3e06d89a83a1f49258254f70cdf9aea4156e3. 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/QZFZ61934399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dee661efae7469daec32d6fc690462409090e9728ee8dd80c97633ee2f898d. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZHN41993056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35b908c9de493d626da9e3296101570cfe4583ab1d861ad6146b9fc08b3765d. 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/QZFYZ2072936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18697cf84318ac3885de56d7a56f59f45c68a67cc8c549608ad7ef084b93e22b. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6K2014845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97dc71a7d0311fa3ef90809fb1683422053e2479e84114a81b2fa4aefe440dd5. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZHN92160705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3395633b7776d6a6357532c8dd40fe8231e8f9e0d378ab9533aa0f3a021d6de. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/QZNWW2131776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286b7947a0292ae7a4cbdfac49c72ae9fe8122b7964bd445c31a8c5886d337f5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZMER2263688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be0b887e5ec20c257d63c09411537819e0cea4c2c82c5099054f1fcd0e797d2. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:12:08Z), 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/QZTAS2296914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d1a51620f159a6731b07ea900970f8184def2c3bfd15a3609dbbe655aa9d8f. 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/QZES72333760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2538c5af7c1e44b448fe94c34ab3b724be8325a5147ff7b0e3ea42fde9c2c544. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/QZNWZ2408298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb016d9ce3631ec8dbde0f70a8694b105d3dba875e92cb9f9e267e7e180d15d. 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/QZWFH2464710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea28a7e294cef65531d03a35fc7f2ab080627b406f4375f440e5269bd88c4ce7. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:29:50Z), 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/QZWFV2414950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f303e2f07ac7cfb1c2b5fa2868022798302c95ca3b90437fb1d1e3d4683421. 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/QZHN42024977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dfd38d02cb39ea1319e058642621d08a97ebc7bf62d8e6d51b1c933a8e7c84. 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/USACX2000808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7f9d9e9f193e1b771bd7ae0afc824f7777ce2a93ced34ee3bf5aa05f8e29f9. 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/TCAFM2149672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26989aa2e726063e41a97e9ae6454e082420f630dadd46df88f5863cd5b526b. 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/QMTND2200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40991932ab277322a3a255a73d686cbf12df3410ce058a75c62e6f773b25eb08. 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/QMTND2200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdedc309131fece3fa0d6444872db09fd55c79cd481540a937d9d83a9508bf238. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QMGR32173854.
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