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 0x5c9c64467261909e22f8fd66b3c055728805493856683784c161f4093929ddce. 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/d3d6daaa-ddaa-400d-a1ce-65cbd5568fdb.json and https://artists.proofprofile.net/proofs/artist/d3d6daaa-ddaa-400d-a1ce-65cbd5568fdb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Picture Me Rollin' / Survival Of The Fittest
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 0xe162e30d3b22fc6ba6b4f702297eb2df646efa4ef088537522c149bc519b1db5. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZMEM2421361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2f97d8a79560ae35fac11f4dde2f44d8f5a90e4ac1d4d1633a00ee9e91bc7a. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNWT2472055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe162e30d3b22fc6ba6b4f702297eb2df646efa4ef088537522c149bc519b1db5. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMEM2421361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b1ae7d6ea45eab4851465f1228f07aa947182523ee4d4b1de2dceecdda5719. 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/QZNWT2472056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f3b5de5df303189702fd6492fbc78a430b3457931145c82fe6683669c95c9f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZNWT2472057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dfbdc95b36b75797ee3997029f55c6adaea1a734b0229b91ef07750e76591d. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/QZNWT2472058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab54ad110e54ed6bb40af5ace00669f84db24e9089af68b35559eea461753b0. 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/QZHN72476692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7781fc3e722c0abe567b776935c83323e2a344066983583ef699f71f5d9265. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZK6M2455979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4d65c6ea78ac4fd40d10d3e0a96c4d59dad7b7945d33b4edc10547d33ea835. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZTAT2451762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4d65c6ea78ac4fd40d10d3e0a96c4d59dad7b7945d33b4edc10547d33ea835. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZTAT2451762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628236a587aafa30e5a0ace53ae19a7e73dc2cce527c0a59ebc3235b5ff9c6d4. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZTB62464126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2351e02d074d295c7e7e994c52f66457dcbefc2982c0b81113745a90260f36a2. 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/QZZ7M2458172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836f190425dad6a77a93d336551d40fbb14bc19c80c642eafd246608069df2c1. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZDA72538247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7430fa7afdda47aee63e76c4ed62ebb5c3cbd5aedf0268959b2bde4c84e99250. 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/QZES82537203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc82ff7b372c9f03d3f0f27f82fa3e0e6bf5307db3b5ac641c1927009110fdb1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZK6Q2522350.