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 0xd61d0026dce2ca2d8f8d721647644605fd4574112d7791525d769e3f9dccdbff. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e83b7aa-5216-423f-a6aa-63127ac73325.json and https://artists.proofprofile.net/proofs/artist/8e83b7aa-5216-423f-a6aa-63127ac73325.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 0xb7923e7bd1e8790991b77ce7465050d7e270801292ad74c879912f6067ed9c48. 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/US9931303740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0314ac882dd904569f6827c8b8e4f928afa837f7ba85feec01c3e9c93b287c56. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/US9931303742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8586ceb381b3178446eab0803a9a795a614ff19daef6f1d0ce06cfc5d11e819a. 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/US9931303745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23bb6abba2ace604c475a90e438d05e81915eabb03cc0d6a7d3b1df2354c7fd. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEE282167802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed0da22d0b507a1db3020222cc0accd31b525a598c50307b6f1b3848e7e8081. 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/DEE282167803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73913c11c3a8af7da84e2f93e076a11b0669b85ee2a9cdf38c2cdd2ef236ec6c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEE282167804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5569dfc3efc857edbf016ad5b36c6af5044a6526ed6ef49816d6c5f921471a. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/DEE282167805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53990098be3b15285fe2ce8ad72166494e6050a8ba4c93e8eab23bae66bfc193. 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/DEE282167806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58c6d442c70b6ce9f17a61066ff5ac15e9da5d0b60eb9143684f2418c626e80. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEE282167808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96aa0a5cbe65f8e3ec6bbf696280046ccaa96d8f9734bb8ad9868996d2063ad5. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEE282167810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351e214b1f9ed9b9af0b13b5ad066846295eecce973329cb40b646f5fb68c608. 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/DEE282167812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37d250b1ac9ebfd032dd126da31fc0f9194c9cd8fde6038ab19f70b066455ce. 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/DEE282167813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e08c407477fb220d947dc867ee0145b91c72fdfd0b0638c24de06cf05b6ad5f. 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/DEE282167814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5569ea16ba367ebf7622cea08b7d7798e1dfb73abc05ea2165f60bc87a168a92. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEE282167815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9540de2cb5e98d657d5bb5ac4030d343b949cd88b2e04aa6cb24f395955be6e4. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/DEE282167816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c53a6ef7b614a43814f78b8c15f830a146c7914f1d11eadcad74fbaa419557c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEE282167817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e3ba5bd202a084dbc6ccaf448c350b41da42551f5c649f00c953698aa8a42d. 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/DEE282167818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3ec9b07f946d079a4fcfedf690b171a547851f0ce70d18a1586fedeb88012c. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/DEE282167819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43ea9e5ce23a236623c78413254252b9be0b04ef363d54adccf377ad0e03053. 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/DEE282167820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fe5c566d8dc426eac6437702ee9d77e1bd722c73b5b7bcad85496808cd17c4. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEE282167822.