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 0xcfdb44f8903d16433e234fae0b2e6080dfe3a5bc2919f8fdb7a5352b454f9857. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b126d8da-f453-4bc1-bca4-090284b3f40f.json and https://artists.proofprofile.net/proofs/artist/b126d8da-f453-4bc1-bca4-090284b3f40f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Where the Earth Meets the Sky - Songs of the Native American Church
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 0x541c1ce72e6af115b2ac5b47ef735acfe48e2ab08cf81f45a8cc0f7d514543f5. 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/QZNAF2100902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e92bd97767a8c75a3239da8ae7222269726743b3bd4da5fcf46af2b438e42d2. 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/US8641047801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1892614a55687fa2a5132da4ad46de77d0756ba29000b2f18b4fbcad36eb85df. 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/US8641047802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe133bc083a3bda71137e9d224a4535b8af829ede03e155b11d0fef1d24ec17ea. 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/US8641047803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c7ff083708d3722d2fc2a607ac53292fd5fedefe2b50d3bca41084a7a09cf3. 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/US8641047804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46250187ec43ea44a9db598b5d372da78e54bfcbd1a1e1aff5f622f08b2f878. 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/US8641047805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62f904fba623be387dba62ffd703f880f9b5f8abcf8fb7a0fb4fd8d5c174ea7. 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/US8641047806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593bef4ef46e1d5261cb789377773ae488336094d686057e17b0a7162366ebec. 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/US8641047807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02af7bde6f039f4ee7e61637e3c3330b927f9150e3e9b39acad0e4ca3ad8759. 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/US8640945401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de11999019d46bc8efefe02cf8fc2e8e4a6c0989ccb31d60bf4e3c72d16ffde. 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/US8640945402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ba6de29abf07ef30c403320bcb21b6415336432f5b40f891c0ea69d59022e0d. 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/US8640945403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd115b32ab212d0345f62ed512c1f1c21673e7b6095648442acf9a8e6ad83f4f4. 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/US8640945404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7f0f1ba6551e93a0c21620abd35b56341dbacfa7265bb73b2d62b5dac7414e. 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/US8640945405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84ff28c7b178c3d71a342b69159c482bbab644cf1502e5bf18945396f5873bd. 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/US8640945407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb89d2be9baf58cea9ef22a37e1a8551b4c2a0648d6234b854f5a01df5c562d. 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/US8640945408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb28ab543e7587d37b4c4aeb889562d76ec84cf6397b4f0edb33a48fbb6453f4. 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/US8640945409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4568bd5b47dd106ac5ac244055cc39674e2262c52f84cf46581c0cdffcb57509. 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/US8640945406.
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 0xcf2e722811664556cca376a7eaa8e7d46d1001f8287cfa1f93863701c03c30b6. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/US8640945410.