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 0xcd4a272626cf5c52396fd73fa24464e9bb932513247c5ed94954bc6b9c885ed7. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/060905d5-ef18-479a-bdbd-7ad09233568a.json and https://artists.proofprofile.net/proofs/artist/060905d5-ef18-479a-bdbd-7ad09233568a.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 0x9fbfd92b15f21511296bd9456d408ffb4f5751ab33062ea6da607038386c7d2c. 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/JPA969590094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ca36fa50131553de30a7c44582d6cf9a8dc9afdb329401c5e46790840a8cc0. 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/JPA969590095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9254c5d67ff5ffa4dd2ccdb7dd064d72485ff455df60eb7eb5fbceb6a634fc1. 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/JPA969590096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b148b0a8f0b958ec862591e9052b04175cdf9677445bc32874c4c01f3ece4b. 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/JPA969590097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc1a07b04440520b57b4cb4b2867bad9232dfb4da92141c00778382a3463f6b2. 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/JPA969590098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bfddaf64c3ff22f121991949b171378218fe837b0debe258a7b9fccc835b96. 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/JPA969590100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd133434e1ce7cdec93d912322038a93a6da1e8513ecd4c625d5172d0177d4c44. 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/JPA969590102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a38745e139882e480bf339ca4380f072760767c34f377b759979c05403d4fb2. 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/JPA969590106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fad170a5667472736c52c14d33acaca514968c5140f3c1e1ef4a7b6d2164522. 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/JPA960590109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c03d0cb1b99d58655894487dbf62d0a5deaf7fd5441d3be2ccb93fa23fa83d9. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/JPA960590110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369f24f6c242fe13e2285bfb80248f69bbde207b59db4e85a5e930531368e28d. 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/JPA960590327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d8386ace687cdbc607b86abcf2c028ab7e1f83738a8afb53d31ff0fe0f1d11. 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/JPA960590328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb290d3a44a70e94367d8c792e9495925e8d6e3d4a5eb3449734485df231f2242. 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/JPA960590329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e263e389b57a8ad260559e5e27321bb2eb6c9f1f4e58a7aaa1e0df1e6578256. 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/JPA960590331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931a6dfb43957530f9b090df881a6c8dd58b86ecbb3853e3b4218df75c00c5b3. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/JPA960590333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57348dc0d562ddec4253276e57f3ecb62b33de4073ed6bd7bf87ff006e775f1e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JPA960590335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d37e9121c9b07cf59ab6ade36f18f102b5ca059a2ab463b5fbd36f359800893. 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/JPA960590338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec4643e8a82e15ba7efbdb12fc74f20a4306f6cba497ec0ec81c86b16f43054. 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/JPA960590019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336954b7dffd646565217cfddaf92f5db5869ce255357cbaeb5c91e790b2f40c. 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/JPA960590218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2bacc4f70289b54d93448378458a9b4a5e99e56361f947471f1fc97acd7f72a. 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/JPA960590220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f53d2bffb4cc4cf0ac663343077d03919828c29215dd2fcc225a5b340a6a3f0. 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/JPA960590221.