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 0x96d415ac402d03264dd77bca571fb3139baba2389b2932c49e381835b4878003. 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/a34ac728-7fb4-441b-a36e-ec92453b72b8.json and https://artists.proofprofile.net/proofs/artist/a34ac728-7fb4-441b-a36e-ec92453b72b8.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 0x53ed952756430df8c88d4d58e12ae0016644fca4cd0478d017724da22b5754fc. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZ7D51701784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757760fbdc315536f07ace975d33bd366b91ccde84f5f2b9e0949e98d53d8592. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZGLS2364065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921cb4468667d364526ed8d1ca4a266217ffba4ae4a84aa242856035b1bb5c15. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:33:59Z), 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/USA2P2460996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05772c18d78db4857fc5d9a23e7c96066b0781c356d87c0aefc4ff90c257ba66. 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/USA2P2469450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d90a50e4ce16a03aa6a04eddf2095ed9d978d006c93c7d7cc3d196b92db3ad. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/USA2P2477304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dee0d0ced687d08bd128f25916440b7e7eb0636bc8247a161b2beef78790369. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:28:03Z), 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/USA2P2501555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125c4b4df713fce72200db65f22d6863a7a2a1fbc96fa2bc21876e89d8e2d1c1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USA2P2519458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3209d15a09c1323170ed12e2b7546a96f2fbff31a17732546a900c7064394e. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/USA2P2521648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978a9a1260cc692aa16df0fa223014dc5aebb14b97a9d76529d299e98d99e818. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:24:57Z), 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/USA2P2523309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10537559066d70d3cd01ced439a3ea27d9f5ea7e61626556e7a0eb3ca0143c8b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T01:00:36Z), 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/USA2P2527774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7067095b4dca17f042ac7674a63c03419810ede8c6f07dcbf1d7af8e2984fed. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2P2530292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bd98dfa679ea7759d788792e84a4fb5a7c516d4f7276b7c6dc0deb5d119a1e. 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/QZGLM2346848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08702b64597ef52961af5cd12dab73fe6b1fbdd3dc71447412f43ebd283cbb5b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/QZ7D51701079.
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 0x17236c9da125eb77172012434d1842f90312154bac50cab84e2a35a9b216ea13. 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/USA2P2227905.